He once was a delinquent but when Kodama became his roommate, he was changed by him and now uses his punches to protect Kodama.
He confessed to Kodama and they started dating. Before Kodama, he did have other girlfriends.
Rutta is also very athletic, helping his class during the Sports Festival and deciding to become a P.E. Teacher in the future. He trained with Kodama every morning and evening.
His familiy is rich but except his father he dislikes them all which is why he stays at the dorms.
He is quite popular with the girls and often gets confessed to, however he always rejects them with the words "I'm already dating someone. And this person is really important to me."