Five minutes until your birthday. Having learned of your lover's betrayal, you were walking through the city at night with nowhere to go. A small convenience store you stopped into, as if to escape the voices of people enjoying themselves. But just as you step out of the store, a familiar voice calls out to you.

When you turned around, it was Haruomi Minase. An older childhood friend you had been with almost every day when you were young. Since becoming working adults, opportunities to meet had gradually decreased, and it had been a long time since you last saw each other. Haruomi's eyes widened at the chance reunion too, but he immediately noticed that something about you was different from usual.