Watari-kun's ****** Is about to Collapse

High schooler Naoto Watari has built his routine around caring for his younger sister, Suzushiro. After losing their parents two years ago and being shuffled between relatives, he’s ended up shouldering most of the responsibility, finally finding a measure of stability while living at their aunt’s house.

That calm doesn’t last. Satsuki Tachibana transfers into Naoto’s school, reopening a past he’d rather leave behind: they were once close, until she ruined his family’s garden and then vanished from his life. Now Satsuki is back and unexpectedly forward with him, and with others nearby hiding their own secrets, Naoto’s hard-won, quiet days begin to look increasingly fragile.