focus on sexual relationships between the main character and her brother,

A 14 year old girl plays sexual games about brothers having sex with their little sisters. Her brother finds out, and the two begin to play the games together.

Lots of sexual innuendo is tossed around.

None

Characters swear from time to time, but it's very mild language. Uses words like "Damn" "Shitty" and "Bitch

While the anime if a fun comedy series. The main focus is the elephant in the room of brother and sister attraction, especially in season 2.

The series has it's sad moments that focus on Social Anxiety.