Soragami Sei

In her third year in the workforce, just turned 20, Aya has her first junior colleague! His name is Yamato. He is 26 years old, six years older than Aya. Yamato-san is fresh and caring, and is very popular among the people in his department. However, for some reason, he teases and shows his "male" side only to Aya, who is in charge of training him.... The mature and smart Mr. Yamato takes the lead, and Aya is disturbed by his pace. She can't do her job at this point...! A secret office love affair with a slightly S-type older man...

Keita, a boring university student, is a gachikoi (fan who's seriously in love) otaku of Mimika, the center of the idol group Tetra. Even though he's aware that it's a love that will never happen, he continues to push on with giving her his emotional support. On the other hand, as her group's popularity continues to rise, Mimika bears anxiety over the uncertainty of the future even while she's happy with the fervently cheering Keita's affection. One day, Mimika falls into despair after her mother gets into a traffic accident, and with the help of social media, she heads towards Keita's part-time workplace...