13 years ago, Win’s father promised his first born’s soul to a demon in exchange for a key to Hell. Unfortunately, there was a mix up and his second son, Lou’s, name was put on the contract instead! Now demon student Viscera is tasked with collecting one of their souls in order to graduate. The two brothers have 66 days each to prove they’re not the one who should be dragged to Hell. Hopefully they don’t do something stupid like fall in love with a demon during that time.