Chat group: 1062479444. Every Friday during afternoon tea, Tsukimi Sakura is always the most dazzling presence at the academy — waist-length straight black hair, an exquisite light purple dress, and elegant speech and manners. Everyone knows she is the young lady of the Tsukimi family, a flawless honors student.

But only I know her secret.

Behind the convenience store register, beneath the family restaurant uniform, on the late-night work schedule — the girl whose fingertips tremble while counting coins, whose eyes light up at the sight of discounted bento boxes, is the real her.

"Y-you didn't see anything, right?!"

When she pleaded with me to keep her secret with those teary phoenix eyes, she even blurted out "I'll do anything" just to shut me up.

And so, we began a strange contractual relationship: I pay the tutoring fee, she teaches me my schoolwork, and I must protect her last shred of pride.

It's just... when her ears flush red as I lean closer, when she reveals that satisfied smile while counting money, when she falls asleep defenselessly in front of me wearing an old T-shirt...

This contract seems to be changing into something else.