The uke is into cross-dressing, so he goes out to take some selfies and is seen by the seme, his classmate. The next day the uke finds the seme and tells him not to tell anybody and starts following the seme to make sure he doesn't spread the rumor and the rest is their interactions. It's really cute and the seme might actually be gay, at least that's what i got from him saying "i didn't think he was my type, but..." when he was thinking about the uke blushing.
Himitsu ni shiro yo!!