Seems interesting so far. Though I'd have prefered an older MC.
If here were to be older then author needed to create a doormat MC but it doesn't go well with action type shounen.
They create shota or doormats to destroy any romance progress.
Shota x Woman? Nope never happening besides in doujin so it became a "manga logic" troupe. (In reality simply publisher logic)
Doormat x Woman? Nope not happening, Doormat-kun will not initiate anything and will deflate if someone initiates.
In essence the core mechanic here is to make male character impossible to date or have intimacy in the context of manga world logic.
In real world logic if i were between 12-14 and up and would see a bombastic beauty like that and by having marks on our ring fingers? Unless she would reject me, we would be fucking like bunnies the very next day.