君は放課後インソムニア [Kimi wa Hōkago Insomnia]

In this tender manga series from Shogakukan (2019–2023), two high school insomniacs find solace in each other's company after discovering they share the school's abandoned observatory. Written and illustrated by Makoto Ojiro, the 14-issue story delicately explores how their secret nighttime friendship deepens into something more, offering a quiet, heartfelt meditation on connection and rest.