Kimi wa Houkago Insomnia

Ganta Nakami struggles with insomnia, which leaves him tired and irritable during school hours, making him disliked by his peers. He finds the abandoned school observatory to be a quiet spot for napping, but another student, Isaki Magari, also has trouble sleeping and is already there. The two agree to share the space, and their shared experience leads to the start of a friendship centered around their unusual commonality.