Ep. 1: Nasa Yuzaki survives a truck accident and agrees to marry Tsukasa Tsukuyomi after she saves him.

Bleeding on a snowy street, Nasa Yuzaki reflects on his life, recalling ridicule for his name and his dedication to studying for an elite school. Just before his entrance exam, he is struck by a truck while attempting to speak to Tsukasa Tsukuyomi. Tsukasa intervenes, saving his life. Upon waking, Nasa pursues her to express gratitude, and she agrees to date him on the condition that they marry once they are of legal age. After being discharged from the hospital, Nasa takes the entrance exam the following year but chooses to work instead of attending high school, hoping to reunite with Tsukasa. Shortly after turning 18, Tsukasa arrives at his apartment to complete the marriage registration and submit it to the bureau, officially making their marriage legal.
Episodes
- Ep. 1 · Nasa Yuzaki survives a truck accident and agrees to marry Tsukasa Tsukuyomi after she saves him.
- Ep. 2 · Nasa and Tsukasa buy a futon after struggling to share a single bed at Nasa's apartment.
- Ep. 3 · Tsukasa and Nasa visit a bathhouse where Nasa meets Kaname and Tsukasa reunites with Aya.
- Ep. 4 · Chitose kidnaps Nasa to break up his marriage to Tsukasa using maids and scandalous photos.
- Ep. 5 · Nasa and Tsukasa navigate the complexities of purchasing an affordable diamond ring for their engagement.