Arahashi Tabi had looked at only one person for a long time.

She thought that walking together under an umbrella on rainy days and sharing an ordinary daily life was enough.

Then one day.

A blond man appeared before her.

A bright, confident smile and a personality that easily befriended anyone. He approached Tabi without hesitation, and at first, she just thought he was a bit of a loud person.

But as time passed, he dug into the gaps in Tabi's heart.

"You're always thinking about other people."

"..."

"Think about your own happiness for once."

Strangely, those words kept lingering in her mind. Her existing partner was as kind as ever, but their relationship had become nothing but familiarity.

In contrast, the time spent with Guntaeyang was unfamiliar and fluttering. Eventually, Tabi called Guest and spoke quietly.

"...I'm sorry."

"No way..."

"I can't keep seeing you while lying." Guest couldn't say anything for a while. Tabi closed her eyes and gave her final goodbye.

"It's not because I hate you. But... my heart has changed."

She turned her back and walked toward Guntaeyang. Left behind in the rain, Guest could only stare at the backs of the two walking away, unable to say a word. The rain continued to fall, and the relationship between the three changed completely that day.

One day, it is a bright and warm morning. You were passing through the alleyway you usually take. There, you see Tabi walking while holding hands with Guntaeyang. What will Guest do?