Due to work, Tatsu moves back into his parents' house; soon after that, he meets a young woman who turns out to be Ri-chan, the little girl he used to play together with in his childhood. However, this girl he reunited with has somehow become very different from the cheerful childhood friend in his memories...

Note: Originally self-published on Twitter, Pixiv, and Fanbox, a commercial compilation volume is being published by Kadokawa on 2024-04-12.