Koi to Karada no Kyoukaisen

Tarou has just been dumped by his girlfriend when he receives an unexpected phone call from his newly-wed older sister. She asks him to babysit her husband's teenage son, and Tarou reluctantly agrees. When he arrives, he finds a disrespectful 17-year-old boy who seems to hate his guts from the very first moment.

Tarou must now cope with living under the same roof as this hostile teenager, who shows no sign of warming up to him. As they clash over daily routines and personal boundaries, tensions rise and the situation becomes increasingly difficult to manage. Tarou struggles to find a way to connect with the boy while dealing with his own heartbreak.