The Quintessential Quintuplets

5Toubun no Hanayome (五等分の花嫁 Go Tōbun no Hanayome?), also known as The Quintessential Quintuplets, is a Japanese romance manga series written and illustrated by Negi Haruba. The manga gets an anime adaptation on its 49th chapter and reaches 2 million prints after 1 and half year of publications.

Plot
Uesugi Fuutarō is a poor, antisocial ace student who one day meets the rich transfer student Nakano Itsuki. They argue but when Uesugi realizes he is to be her tutor, he tries to get on better terms. While trying to do so he meets four other girls.

Other Wikis
https://5toubun-no-hanayome.wikia.com/wiki/5Toubun_no_Hanayome_Wiki