Leprechaun

Takuya Yukizuki, a handsome but eccentric boy, got into an accident, and his soul was transferred into his cat, Robin. And so he learns of the far-reaching ambitions of the leader of the local feline gang...? Mineo Maya's gag manga masterpiece!

(Source: Hakusensha, translated)

Also Includes the one-shots Tarot (タロット), Youma Leprechaun (妖魔 ―レプラコーン―), and Makai (魔界)