Barnes & NobleSasaki and Peeps, Vol. 2 (light novel): While I Was Dominating Modern Psychic Battles with Spells from Another World, a Magical Girl Picked a Fight with Me ~You Mean I Have to Participate in a Death Game, Too?~ by Buncololi

LUCRATIVE ALLIANCES AND DIRTY DEALS… Sasaki's pet bird (and otherworld sage) Peeps has gifted him with powerful magic and the ability to cross between worlds, all to game the multidimensional system and live the good life. Due to unforeseen circumstances on both sides, though, things aren't going as planned. Sasaki's job as a government psychic isn't all it's cracked up to be, and with a magical girl out for blood, a neighbor giving in to dark temptations, and a former enemy changing sides, Sasaki and Peeps are looking at a big traffic jam on their road to success!