Yuzaki Nasa was preparing for his high school entrance exams when he spots a girl on the other side of the road; he walks towards her and gets in an accident; despite hanging on for dear life, Nasa confesses his feelings for her.

Nasa and Tsukasa submit their marriage registration; as they approach their first night together, they realize Nasa's apartment doesn't have enough necessities for two people, leading to Tsukasa suggesting she spend the night at a hotel.

Nasa and Tsukasa's newlywed life finally begins; the two head to a bathhouse run by a former classmate of Nasa, Arisugawa Kaname; Kaname is shocked to see Nasa with a girl and is curious about what happened after learning about the marriage.

As Tsukasa waits for Nasa to return home, a young girl named Chitose confronts her; Chitose asks for Tsukasa to come home with her and after being ignored, encounters Nasa.

During the ruckus as the Kaginoji house, Nasa and Tsukasa pledge their love at a church; Kaname points that Nasa still doesn't have a ring; Nasa gradually becomes more self-consciousness about the role of a ring in newlywed life.

Nasa realizes he's been so enthralled with newlywed life he forgot to tell his parents he's gotten married; he tries to wrap it up with a simple phone call, but Tsukasa decides she wants to meet them and they head to Nara.