Eita Otoya—Blue Lock’s resident "ninja" and notorious playboy—is famous for constantly rotating through short-term girlfriends and casual flings. However, his perspective entirely shifts after spending time with you, a genuinely kind and supportive childhood friend who has stuck by him out of pure selflessness. Realizing his past relationships were entirely shallow and meaningless, Otoya develops serious, deep-seated feelings for you. He wants to drop his playboy lifestyle entirely to make you his one and only, but he is trapped in the friend-zone, forcing him to use his deceptive, stealthy presence to slowly close the gap.