Sport Festival

With Hotaru and Natsume he attempts to rescue Mikan when she got captured by the student police. When they are confronted by Tsubasa they choose to leave the matter to him. Ruka and Hotaru then spy on Tsubasa's and Natsume's conservation about Tsubasa being the dangerous ability class and Yuka being Mikan's mother. Ruka is later a participant in the Obstacle Race. He was able to pass the lake stage by flying over it with a bird. He then finishes the race and win by gaining the trust of the robot horse with the help of the other animals. This gets him the praise from Mikan he wished for and the two spend some alone time eating a picnic together.

Haba Hime Arc

Ruka attends Mikan's birthday party and the New Year's party altogether. During the parties, he became stuck to Hotaru and Youichi and was allowed to go to Hana Hime, but crossdressed as a girl. While at the party he is given the nickname Himawari No Kimi and fits in the party. Ruka along with Hotaru find Mikan and Youichi and look for Natsume when he goes missing. At the basement of Hana Hime Ruka uses his alice to control the mice against Rui and Hayate. He tells everyone he will take care of them so that they could get to Natsume, but Youichi Hijiri and Tsubasa Ando volunteer to. After leaving Tsubasa and Youichi he tells the group of Natsume's and Ruka's past.

After he tells them Ruka, Hotaru, and Mikan split in different directions. Ruka finds Natsume and Hotaru asks Mikan to come to the path Ruka took. While there Nobara is seen in her second personality. As Persona uses his alice Ruka tries to protect Mikan, but one of the mice gets killed in the process. When Aoi appears Ruka recognizes her and becomes paralyzed by Yakumo's insect along with Hotaru and Mikan. At the hospital Ruka suggests that since Aoi is not an alice she should be allowed to leave. He then shown helping spread the news. Ruka like everyone else says his goodbye to Aoi. When Mr. Hyūga arrives his mother also arrives and he hugs her through the gate, though he and Natsume are escorted away from the gate. As hears Mikan talk about her star ranking he chooses to throw away is stars and states that now he is like Mikan, but this did not change his star rank.

Christmas Ball Arc

Days after returning to the academy, Ruka joins everyone shopping for Christmas at Central Town. He also helps arrange a late birthday party for Natsume. He gives Natsume a sand clock, saying "If only we could turn back time", which makes Natsume choose Ruka's gift as one of his favorites. During the prepartations for the Christmas party, Ruka runs into Piyo decorating the Christmas tree and helps him.

Ruka kisses Mikan at the Christmas Ball.

During the party, Ruka blushes as he sees Mikan dressed up nicely. He offers to help Mikan with the cleanup, due to a deal made with Bear if it played with Youichi, but she insists she can do it alone. Ruka and Youichi go on the balcony to thank Mikan for her hhradwork. After Yo-chan kisses Mikan as a sign of thanks for giving him Bear to play with Ruka kisses her other cheek as another thank you. ^[2] This causes Mikan to be in shock and avoid Ruka, who is teased for daring to kiss her by Hotaru. He gets Mikan and Natsume to dance with each other since they didn't at the festival. He was surprised that Mikan and Natsume accidently kissed, but Natsume prevents him from asking him if they did kiss. Later on, this is cleared up during the Big Clean up Day chapter. Awkwardly Ruka, Mikan, and Natsume are grouped together to clean up the hallways by Jinno. Suddenly, the lights go out, which results in the situation being more uncomfortable. He and Natsume both notice that Mikan is scared, and to comfort her, they both at the same time hold on to Mikan's hands (Ruka holding Mikan's right and Natsume holding Mikan's left). Ruka and Natsume each wear a serious face as they compete over Mikan who is oblivious to the whole thing. A few moments later he and Natsume burst into laughter about what they are doing while insulting each other in a almost friendly manner.

Z arc

After the festival, Ruka studies for the final exams along wih Class B. After linchou's Alice is stolen and Hotaru is injured by Z, Ruka, Mikan, Natsume, Tono, and Tsubasa sneak into the

Ruka and Natsume as 15-year-olds~

 high school section to use the rumored Warphole to go Z's hideout. Ruka, Mikan, and Natsume must disguise themselves as high schoolers using Gulliver's Candy. He is flustered after seeing Mikan as a high schooler, and even though he is older inside, he is still a ten year old. Not long after arriving in the high school section, he and Mikan become trapped in anti-gravity chamber- they accidentely went into it after their Gulliver's Candy wore off. Ruka and Mikan are both rescued by Tsubasa's Alice. Ruka along with Mikan, Tsubasa, and Mikan use the Keyhole (acutally called Keyhole and not Warphole) after proving themselves to be serious about going to Z's hideout to president Sakurano and vice president Subaru.

They are transported to a wooded mountain with dangerous traps surrounding everywhere. Ruka and Penguin were about to be turned into to stone by a tree, if Mikan didn't nullify the attack using her Alice powered up by Tono's Amplification Alice. Ruka's Animal Pheromone Alice becomes a very valuable source of information for the group, with him being tasked with asking the animals which warphole Z used. Ruka and Mikan spend some time alone admiring the view of the lake reflecting the moon, the night before using the warphole to transport to Z's location. He promises Mikan that one day he will give Mikan his Alice stone and she agrees to give him hers (Mikan didn't know about the exchanging of Alice stones meaning soul-mates). Ruka is overcome with guilt when he realizes that Natsume also has the same feelings for Mikan and leaves her to find Natsume, so he could see the view of the lake too. He later eates some grapes that Penguin brought which turns out to have alcohol in them. This causes him to hug Mikan, but is peeled away by Natsume and falls asleep. Later on, when he, Natsume, and Tsubasa was fighting the Z's, he got affected by the Z's boss alice from protecting Tsubasa. He is healed by licking Z' boss' blood off a knife, given by Yuka. Then, the ceiling collapses and they flee. Despite the apparent life-threatening circumstances of the escape, they all return safely to the academy.

Alice Festival Arc

Ruka smiles to Mikan and is more friendly with her days later, which makes a lot of students aware that he is growing to like her. He, Sumire Shōda and Narumi go to the special classes RPG, because they had nothing to do. While there everyone commented how his bunny ears made him look cute (including Mikan which made him embarrassed). Ruka blushes when he sees her in her genie outfit and thinks she looks cute. He became one of the first challengers for the RPG game, his weapon was a rope. He lost on the first round, because he could not figure out which was the real Misaki Harada before time ran out.

Ruka is playing Snow White in the a play and asks everyone not to come, but they do anyway, telling him how cute he is (putting him in a bad mood). A accident with slime balls occurs that put most of the cast out and having Mikan play the prince in the play. Mikan puts on her prince costume, which makes Ruka blush and he wanted to say she looked cute. The play starts and he and Mikan are in a tower scene with Permy/Sleeping Beauty saying she will separate them. In the next scene Ruka with the fake animals then the real animals that are in the

Ruka as Snow White.

audience come on stage and sing along. The scene changes and now Ruka is with Narumi who says that he will kiss him causing the animals to attack Narumi. Ruka is then with the dwarves where he gets bitten by a poison(-free) apple. Mikan is told to kiss Ruka on the lips, which makes both uncomortable. However, they attempt to kiss for the sake of the play, but are interrupted by Natsume, who throws an eraser (or apple in anime) at Mikan, and Hotaru, who shuts off the lights, ending the play. afterwards, Mikan and Ruka are shy around each other, but congratulate each other and say they did a good job in finishing the play.

During the Alice Festival Last Dance, he and Natsume have many girls who want to dance with at the last dance. but, both have no desire to dance with them. Ruka, however, wants to dance with Mikan and can't bring him to sat so when she asks if either of them wants to dance with her. Natsume pushes Ruka to Mikan so that he would dance with her. Mikan and Ruka enjoy dancing with each other. After Mikan and Ruka finish their dance, Hotaru then grabs Ruka's hand and tells him that girl (Mikan) is so dense, which he does not understand. When he goes to get a piece of cake, he overhears Mikan and Natsume talking and hears Natsume call Mikan by her first name, which surprises him. He is further surprised when he sees Mikan blushing as she walks away, this leads him to believe that Mikan likes Natsume. when he sits with Natsume, he mentions that he called Mikan by her name and says that Natsume should dance with Mikan. They bicker over this until Hotaru chooses Mikan as her last dance partner, which makes them laugh.

Reo Arc

Ruka's Somatic Class is one of the most popular classes during the Alice Festival, so he has to help out a lot. However, he escapes during class to see Natsume, who skipped and is not allowed to participate in the festival. Along with Sumire and Youichi, Ruka goes to the hospital to see Natsume, who has fallen sick due to his illness. Later on, when Natsume is kidnapped by Reo, he helps Mikan and Sumire escape by having his bird friends distract their pursers. He stays in the teachers lounge with Hotaru and the teachers to keep in touch with Mikan about the situation. When Natsume denotiates the warehouse in anger over how Reo's men injured Mikan, they are returned to the academy and hospitalized. Ruka visits Mikan and thanks her for saving Natsume, showing his acceptance towards her and the first sign of his liking to her.

After the Northern Woods

He is in class when Natsume comes in with injuries that were not there before and is shocked. He tries to ask what happened, but Natsume assures him that he is alright. He sits quietly as Mikan is bullied mercilessly by their classmates and teachers, and earns a no star due to a prank done on her to make her teacher hate her. He later warns Mikan that she might be targeted, because what happened should of not made her a no star. By accident, Ruka is in Mikan's team for the dodgeball match when he was tring to go to on Natsume's team. Although he wanted to be on Natsume's team, Ruka encourages Mikan to keep trying when their team was losing. Like everyone else, he eventually gets into the game and has a good time.

Ruka sneaked into Mikan's room to give her food on Hotaru's request. He then helps Mikan who wants to escape by providing her a bird to escape and dressing as a girl to replace her. Unknown to him Hotaru took pictures and he confronts her in the next chapter. He and Hotaru find out about Narumi trying to leave to talk to Mikan's Grandfather.