"Kai! Do you know where Qi went? He hasn't answered his calls or even sent a message in seven days, and he still hasn't come home!"
Tan Kai, who had rented a seven-day girlfriend to bring home and appease his mom, was now facing his best friend's anxious parents.
"Don't worry. I have his other phone number. I'll try calling him."
As he spoke, Tan Kai dialed that familiar number.
To his surprise, the familiar ringtone the two of them had chosen together came from the "rental girlfriend" beside him...
(A short story about gender transformation, told mostly from the male lead's perspective, with occasional sections from the heroine's perspective.)