From Chibi Manga:
Suzuno has been working at a stationary manufacturer while repaying the debt incurred by her father 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…!?