Ethan, a Great Immortal from another world, was sent to the human world after his unsuccessful tribulation to cultivate once again. That's where he possessed the body of Ethan, an ordinary high school studen...

V.1 - Tantei Kitan 1. Detective lecture 2. Switch 3. 14 year old consultation room 4. In bereaved beer ... 5. Karakuri (Clockwork) Her grandfather has passed on, leaving a mecha in his likeness to help her....