Alternative Title: ニセコイ

Type: Manga
Volumes: 2 and counting
Chapters: 31 and counting
Author: Komi Naoshi
Serialization: Weekly Shounen Jump
Genres: Comedy, Romance, Shounen

Synopsis: Ichijou Raku is an honor student with outstanding grades and an admirable conduct. He has a female childhood friend named Kirisaki Chitoge who has slightly better grades than him, or so he says. They haven't been getting along since the day of Christmas after they gave each other gifts, and they also have opposite taste of things.

Their families are currently on a war because of business rivalry, the boy's family are Yakuzas while the girl's family are gangsters. The leaders of both groups would like to get along, because if the war will not be stopped, there will surely be many casualties, and the problem is that their underlings wouldn't listen to them, so they decided on something that will make them cooperate, they want Ichijou and Kirisaki to become lovers so that their families will come to an understanding with each other.

Resources: Mangaupdates | MyAnimeList

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My currently favorite wsj series ever since the bakuman ended.

Imperial Scans - Chapter 31