Soikano: Gyutto Dakishimete The Animation (2018)

Tired from all the extra work he's been doing at school, our main character decides to use his lunch break as "nap time". He finds a secluded area in a tower that was supposed to be the gardening club's responsibility... but it looks like no one has been here in months... After a few times napping there, he notices that he always has the same dream... however this time something is different... He wakes up to feel something warm and round pressing against him... It's the missing female student that everyone has been asking about. And she wants to sleep with him!?