Felt more like a promo for doujin and not a good one at that. Author teases us with older gf fetish vibe but at the same time pushes down 2 girls of the same age that we didn't ask for. Author doesn't understand things about fetish, you pick a fetish manga to see your fetish to be satisfied not ruined by 3rd wheels of opposite fetish.
If you are a pussy about this (author towards underage(legal though) romance) then make MC an awkward 18-20y old.
Ohh and MC is frustrating, he has biggest delusions and imagination and 0 action. If i were to have those kinds of delusions like him, i would already try to scout out the possibility of us dating. Instead he keeps being flustered 24/7 and does literally nothing to advance towards his "Ideal wife".
For a person who has "Ideals" he has 0 drive. MC that needs to be NTRed (i don't like NTR).