Smile Syndrome: Lost Night

That night, Ayano Yumi brought a girl home.

This is the everyday story of that girl making new friends and growing up.

Of course, this is a very straightforward story. Urban legends aren't real, and ghost stories are nothing but absurd nonsense. No dragons are lurking in the depths of the sea, and no gods are constantly plotting to wipe out humanity. And there's certainly no need to hope that some mysterious organization is secretly protecting our peace from behind the scenes.