Your Summer, My Storm Episode 4

Takemiya Natsuki has long been puzzled by why Kobayakawa Sota, his older sister Rio's boyfriend and also his private tutor, seems to shine so brightly in his eyes. Without admitting the feelings are his own, Natsuki turns to his best friend Konno Ryo for advice, only to be told, "That's love." But Natsuki isn't even sure what "love" really is. As he listens to the romantic worries of kindergartener Yanagi Riku, he eventually convinces himself that what he feels for Sota definitely isn't love. One night during a tutoring session, a sudden thunderstorm brings the trains to a halt. With no idea when service will resume, Sota ends up staying the night at Natsuki's house. To make matters even more complicated, the two have to sleep in the same room... and even share Natsuki's bed!? (Source: Japanese = TV Asahi || Translation = kisskh)