Momo is the younger sister of Lala, the alien princess who has long since been engaged to the human Rito. Although Rito’s heart continues to waver between Lala and his first crush, Haruna, Momo finds herself unable to deny the feelings she has for the hapless human male. Instead of giving up, Momo attempts to surround Rito with a harem of beautiful women, all working towards urging him to marry Lala, become crowned as King, and as a result, be allowed to marry his entire harem—Momo included!

Rito Yuuki continues to be caught in over-the-top perverted scenarios, now uncensored. The alien Deviluke sisters - Lala, Momo, and Nana - still use their unique abilities in an attempt to grab Rito's love confession. Momo, in particular, has a vision: a harem of women all in love with Rito, with Momo herself in the center. After all, if everyone has an equal share of Rito, everyone wins - at least, she thinks. As she enacts this plan, the former alien mercenary Yami, aka Golden Darkness, struggles between her former life as a killer and her current life on Earth. Things get complicated when Mea, a girl with powers similar to Yami's, becomes interested in Rito. Just who is this new enemy?

Special chapters published in *Weekly Shounen Jump* and *Jump SQ.* celebrating 20 years of work by Kentarou Yabuki as a manga artist.