It's still early days but this seems to be charting in the Boy's Abyss direction. Every character is a shithead and literally everyone is either mentally ill or clinically depressed. She's even repeating the whole three childhood friends schtick.
Haha the uncle is a bastard, isn't he? Guy openly flirted with Momji while she is playing into it on ch 3, probably would go for her without a second though. Also intimidated Mayu for the drinking session.