From Chibi Manga:
Working for a stationary manufacturer, Suzuno repays the debts incurred by his parents due to certain circumstances. However, this was discovered by Watarai. “I will protect you, so let’s get married!” he says, as he offers to shoulder the debt in exchange for Suzuno’s hand in marriage!? Despite the hesitation, Suzuno accepted and thus begins their daily lives as newly-weds! Unknowingly, Suzuno, an amateur in love, gradually stimulates the possessive nature of Watarai…!?