Bruh... omitting the answer
This manga really should have stayed as a one shot. Which is something I hardly ever say because most of the time I'd like one shots to be more fleshed out in a serialization.
Nah, I wish it'd stay at just MC (a random guy) enjoying fun times with a gyaru, each chapter is a different activity (sports - there are tons, date, home date, beach, an afternoon where they stay at the school late to do stuff and witness the beautiful sunset together, hot summer day, cold winter day, playing with snow, etc.) or something similar, like dagashi kashi, an episodic run. It would still keep the continuity of each chapter though. When I saw that the MC's origin is that he's from a prestigious family and he plays piano and has to follow tea ceremonies to a tee (no pun intended) I know there's gonna be some unneeded convoluted stuff. This manga started out as just pure fun and fluff and should've stayed that way but then it adds drama 😭.
There's also another manga that suffer this same fate, bogged down by expanding the scale. "I love you but first please die".