I'm enjoying this manga, but tbh so far it feels a little...tame? That's not a critique I normally have, but with how self-consciously sexual the entire setup to this manga is -- going to an older girl's room alone at night and literally sleeping with her on the same bed -- it honestly feels a little off to me that all they've done so far is snuggle, especially with how overtly senpai is seducing the MC. Maybe this will change as the manga proceeds, but for now the PG-ness feels out of step with the manga's presentation, premise, and themes.
Regardless, it's a very atmospheric read and the art is great, so I'm definitely looking forward to more.