Morinaga has finally became one with his sweetheart, Tatsumi. However, he returns home from a week-long training session to find that Tatsumi has turned into a raging demon once again! To pacify the demon, Morinaga begins a search for new lab assistants? but what happens when he?s consumed with jealousy and anxiety over the new (beautiful) assistants?! Morinaga is quickly losing confident in their relationship, can Tatsumi stop their love from falling apart?