This is certified slop. I have read many adult cast romance. From the one that just casually sexual and the 30 something virgin trope. but for the very least they act like an adult once in a while and you kinda get that adult feeling in the tone of the relationship. But this manga definitely is not one of those because the tone that the mangaka give is definitely a middle school romance vibe. It's just kinda bizzare and annoying. This manga have a lot of fan service. I mean a whole lot. + the stale uninteresting 'nice' guy trope + an idol girl Andthe middle school vibe while being an adult is just felt so wrong. it's basically a self insert manga with a heavy fan service centric core.

It would be better in my opinion if the cast are high schooler or maybe younger. It's just off putting and bizzare at times.

Final score:
Art : 8 (The mangaka definitely draw hentai and know how to draw a seductive idol type)

Plot : 4 (I can't just remember anything because the annoying interaction between the mc)

Character : 3 (pretty uninteresting and kinda over the top in an annoying way)

Vibe : 1 (the middle school vibe is such a turnoff kinda kill the mood while reading it)

I don't know what to tell you. it's not goon enough to call it a fan service manga but the characters is also not interesting enough to grip you while reading it. The only saving grace is the art which is pretty good. If you want an interesting adult cast manga you better read 'changes of heart' and 'sweat and soap' if you want the smut or 'dame na watashi' and 'wotakoi', if you want the ones without it. This manga is self insert to the max with a pretty uninteresting characters. so if you in the mood for some slop it would satisfy your need but if you want an interesting manga I wouldn't recommend it to you.