Marriagetoxin

An assassin must marry to appease his clan and save his sister. Small problem: He doesn't know how to date.

Kinosaki takes Gero to practice dating in a floating art museum that becomes the scene of a heist.

Gero fights a Water Master to rescue Himekawa, but his real challenge is taking her on a date afterward.

Gero goes undercover as a student to guard a corporate heiress, but he isn't the only Master on campus.

A test of courage seems like a romantic opportunity, but it turns out to be a deadly trap.