Kosuke is a big otaku and loves 2D girls. He is so in love with his 2D girls that he sleeps with body pillows of them and invests large amount of money on their games. He knows that other people would find his preferences weird, so he usually hides them and plays a ladies man, who's been in love with lots of women. Usually when he tells a love story or something he did with a girl, it's from the dating sim games he is playing. Even though he no longer plays soccer, he still loves wearing their T-shirts.

(Source: Rike ga Koi Wikia, edited)