Danjo Hi 1:5 no Sekai demo Futsuu ni Ikirareru to Omotta? Gekiomo Kanjou na Kanojo-tachi ga Mujikaku Danshi ni Hanrou saretara

Before he knew it, the protagonist, Masato, had been transported to a world where the number of women was just a bit higher than in his original world. However, aside from the fact that women were a little more assertive, the world wasn't much different from the one he came from... or so he thought. Little did he know, the kindness he spread, based on the standards of his old world, was saving those around him more than he could imagine. He was unaware that this kindness was causing the women around him to develop intense feelings for him. This is the story of a protagonist who believes he can live an ordinary life, unknowingly making the heroines fall in love with him, and eventually realizing just how heavy their feelings are—until they make him understand it for himself...!!

(Source: Kadokawa, translated)