Sooooo, this is a show about a crazy person! She was once not crazy, but just kinda…there, sleeping around, feeling nothing. But then she felt something she never felt before: pure, true love. Interestingly, she felt it for a young girl, Chio, whom she keeps at an apartment she’s maintaining, and treats her like something between a daughter and a little sister.
Upon meeting her, Chio became Satou’s everything, so she now does anything and everything she can to ensure they can remain together and keep the lights on and their bellies full. And I mean anything.
She has to work in order to afford utilities, food, and the like, so Satou gets a job at a cafe run by an older (but still young) woman. When Satou becomes the toast of the town there due to her innate cuteness, and a waiter confesses and asks her out, her coworker snitches on her about rejecting him.
The manager then proceeds to make Satou’s life miserable, making her work overtime doing pointless tasks. But when she docks her pay, the very thing keeping Satou in her titular “happy sugar life” with Chio, Satou snaps, and fights back, proving she can be just as ruthless as those who wronged her.
Satou gets the manager to confess on video ranting about what she did to the rejected waiter (who is locked in her closet, naked and crying, the victim of sexual assault) but isn’t interested in justice, only blackmail and getting paid. The ordeal is a very bitter experience for her, but it all melts away to sweetness when she returns home to Chio.
The only problem is, their “home” is a house whose original occupants she murdered and still stores their hacked-up remains in a spare room, the bags drawn shut with, presumably, the hair ribbons of Satou’s victims. We also learn that Chio is a missing child, and that her older sister might be Satou’s only friend in the episode, whose body fat content she could calculate with creepy precision.
So it would seem her experience at the restaurant didn’t make her crazy; she was crazy long before that but was simply trying to keep it together. Obviously, it’s a bit difficult to root per se for a homicidal kidnapping monster, especially when her charge Chio is pretty much a cipher.
Chio may not be in immediate danger—she’s the one thing in the world Satou seems to actually value—but then again, Chio never once asks what’s going on, where her family is, or whether it’s okay if she can please go now. Does Satou love Chio enough to give her back to her real family, or is her love wholly dependent on possession? Hmmmm…