Kizuki quits his job to pursue swimming. Meanwhile, Shin is out with a fever and Mizuho pays him a visit.

Airu reminisces the times he had feelings for Kizuki. Syugo's family restaurant faces uncertainty.

Kizuki finally brings to light an incident from the past that caused him to break things off with Mizuho.

After a fight breaks out with Syugo and Kizuki, the friend group reunites for the first time in years.

The seniors graduate and celebrate their last day at the pool, leaving behind heartfelt messages.

Mizuho believes her relationship with her friends could fall apart due to her dating Kizuki. However…

Airu takes a chance and confesses his feelings to Kizuki and his delinquent past is revealed.

Mizuho reminisces the day her and Kizuki started dating. Shin approaches Mizuho with his feelings once more.

The year is 2030. Mizuho hasn't heard from Kizuki in years. But at the fireworks festival she bumps into...?