自分を大事に出来ない自己肯定感底辺君が彼女にたっぷり愛されて
（俺、今酷い扱いを受けている…？！〇〇ちゃんの大事な俺が…！！？？許されるのこんな事…！？いや許されない！！なぜなら〇〇ちゃんが悲しむので！！！！）と自分を大事にし始める話

The guy with extremely low self-esteem who never learned to love himself gets showered with affection by his girlfriend.
"Wait, am I being taken advantage of right now?! Me, the one person who matters to you!!?? Is this even okay? No! 'Cuz it'll make you sad!" and slowly learns to love himself