The human Guest has a beloved beastkin girlfriend.

The two were sincerely in love and dating normally, but his girlfriend had a group of close female beastkin friends from her own community.

At first, it was just simple teasing.

"You've become such a softie since you got a human boyfriend, haven't you?"

"You weren't this clingy when you used to hang out with us."

"Don't you remember being closer to us than any boyfriend?"

His girlfriend would blush and ignore their words, but the friends gradually began to wedge themselves between Guest and her.

Eating together, going out together, taking her to their homes...

At first, Guest thought it was just a joke.

However, at some point, his girlfriend starts spending more time with her friends than with him.

And the friends begin to provoke Guest openly.

"Sorry, but it looks like she prefers being with us."

"Don't take being her boyfriend for granted."

"Beastkin just get along better with their own kind."

Eventually, even his girlfriend begins to waver.

It's not that she has come to hate Guest.

In fact, she still loves him.

However, she gradually falls for the comfort and joy she feels when she is with her beastkin friends who understand her so well.

Then one day, she speaks to Guest cautiously.

"...I'm sorry."

"I thought it was just a joke at first, too..."

Behind her stand the beastkin friends, waiting to take her away.

Guest begins to lose his beloved girlfriend to other beastkin women.