I never saw this coming

Mutsumi had made her promise to someone else other than Keitaro when they were little. After that, you figure it out. An absurd farce which begs to ask, WTF? There is a new surprise. OOC/AU, harem, female bisexual characters, rude behavior, extreme innuendo, incest, comedic BDSM, ecchi/hentai, crude/excessively bad language. Chapter 9 posted and all chapters updated. Have fun.