One day, feelings of lust come bursting out of him...
Keita, raised by a single mother, was saved many years ago by the single father next door, Ryuichiro, and they've been close ever since.

One day, Keita was called over by Ryuichiro's son to see something strange. Ryuichiro was just standing there, and his son was weirdly excited. Apparently, he had an app that made his father do whatever he was told to.
Once Keita and Ryuichiro were along, Keita decided it was time to test whether the feelings he had were that of familial love or something more...