Hare-kon

Hare-kon (ハレ婚, Hare kon) is a manga written and illustrated by NON.

Plot
Koharu, tired of all the men in her life being lying, married philanderers, decides to move back home, away from the city. Once there she finds her family saddled with a huge debt and no way out, until a handsome but creepy stranger offers to pay the debt, at the same time asking her to marry him. But, as if things weren't crazy enough, he already has two wives!