Is Love Sustainable?

A renewed quest for romance begins for Kyoka Sawada and her father, sparked by their discovery of a shocking document in her late mother's belongings.

While hesitant to join the marriage agency, Kyoka agrees to meet a partner through their AI matchmaking. Hayate adopts a stronger courting method.

Without consulting Kyoka, Rintaro lets Hayate move in with them. Kyoka can’t stop thinking about the night she saw Seita walking with another woman.

Seita invites Kyoka to a gym that offers heart-pounding workout programs for couples. Their joint exercise both strengthens and strains their bond.

While organizing a yoga studio event, Kyoka decides to sell some of her mother's clothes. However, an important keepsake goes missing in the process.

In a bid to help Hayate get with Kyoka, Nijiro invites her to a school camping trip. But things take an unexpected turn when Seita suddenly appears.

Kyoka and Seita agree to go on a date without the pressure of thinking about marriage. Later, Rintaro receives a date invitation from Akari.

Having discovered Kyoka and Seita are dating, a conflicted Anna wants to support both Kyoka's independence and Nijiro's relationship with his father.

Kyoka remains upbeat regarding her situation with Seita, but Hayate worries about her. Some alarming news causes Rintaro to rush to the hospital.

Seita becomes convinced he has missed his chance of getting back with Kyoka. Akari visits the Sawadas and makes a personal request to Kyoka.