Way late to this but yes shio is a kid but i would recommend looking past that as this manga has so much more and is something i’d recommend reading. It is NOT an alternative to killing stalking as they are a loving pair who love each other a lot. I wouldn’t call it grooming since shio was the one who reached out to sato and did it all consensually, she also did NOT get kidnapped. And it includes romance aspects. I don’t know why the other reply would lie to you.

Someone recommended this as a GL alternate to “killing stalking” so naturally I ran to check it out. Before I start reading - is one of the main characters a literal child? I’m reading the description and it keeps referring to a “little girl”