Akira has a very forgiving nature, especially in regard to his love interest, Natsumi Kimiyoshi. He forgives her for stabbing him in the stomach as well as for murdering her parents and grandmother. After Natsumi's mental breakdown and concurrent amnesia, Akira tells her that he is the one who killed her family in order to spare Natsumi the mental anguish that the guilt of her actions would cause.
Soon after he meets Natsumi Kimiyoshi, he confesses his love for her. When Natsumi is being questioned by Mamoru Akasaka and Kuraudo Ooishi, he goes to pick her up and walks her to her house. Upon arriving, talismans are placed all over the house, and Akira leaves. When Natsumi says that she isn't related to Hinamizawa, he is the only one who sticks up for her.
Later, he has a conversation with Ōishi and Akasaka regarding Natsumi's relationship with Hinamizawa and Oyashiro. After his conversation, he calls Natsumi's house from a nearby payphone and hears someone cry for help. When he reaches the Kimiyoshi residence, he looks for Natsumi. However, as soon as he finds her, Haruko Kimiyoshi smashes a vase on his head and knocks him out. After the Kimiyoshi family incident, he forgives Natsumi for lying to him about her relationship with Hinamizawa.
While Natsumi is in the hospital, Akira helps her with her schoolwork. When he tells her that she was the one who killed her family, she, in her confusion, stabs him. Akasaka and Ōishi state that Akira has two choices. One choice is to die, while the other is live in despair. Akasaka thinks that he chose the latter. However, he forgives her.
In the epilogue of Onisarashi-hen, he is shown to be living in a small town and goes to a university there. It is revealed that he had been separated from Natsumi for 5 years. When he found her, she was being cared for by Kimiyoshi family members. However, they kept her locked in a talisman-filled room, because she was "cursed by Oyashiro-sama". He rescued and married her, so she would be freed from the name "Kimiyoshi". Also, he told her that he was the one who killed her family, so she wouldn't be hurt. Being too unstable to live in a house, he moved her to a local clinic where he visits her often.
- Akira shares a name with Akira Toudou from Special A.