To start off, this anime rarely acts as a harem. It's more similar to Watamote than anything else. Kae Serinuma is plunged into several situations she's never been in such as having an romantic relationship. Everything that she's learned about relationships, is from her insane BL/fujoshi lifestyle. To say that our main character is oblivious and unrealistic is wrong, and it puts a complete twist on the harem stereotypes. She isn't looking to screw one of these guys, but instead wants to see the guys screw each other. She's a static character in a dynamic environment.
That's what makes this anime great.
Serinuma is set in a situation with 5 guys + 1 girl in which she doesn't know how to handle, so she puts them in ludicrous scenarios (or the guys put themselves in ludicrous scenarios) where she can keep her BL lifestyle alive. It's the perfect protagonist for the intended audience.
The show makes it that every character is likable in someways. Our MC's disinterest in the others makes it so that this can spark conversation, shipping, etc for the fanbase. One episode even makes fun of that exact premise. Overall, the character interactions and humor is great. It's kinda like "One Punch Man", you either understand it or not. Not for everyone, but still a great show and I highly recommend it to anyone that understands fujoshi or BL culture.
