Kosuke is an avid otaku who adores 2D girls. He's so passionate about his love for them that he uses body pillows featuring these characters to sleep with and invests a significant amount of money in games related to them. Although he knows others might find his preferences unusual, Kosuke often keeps his true feelings hidden and presents himself as a ladies man who has been in love with many women. When sharing stories about romantic encounters or activities he's engaged in with these characters, Kosuke typically draws from the dating sim games he plays. Despite no longer playing soccer, Kosuke still enjoys wearing T-shirts featuring his favorite 2D girls.