Many references to characters having s*x with people and or wanting to throughout the series

I'm the opening theme song, male characters are shown naked many times although private parts are covered by objects. Men were revealing outfits sometimes as well

Characters can be seen in comedic fights.

Sunako has constant nosebleeds throughout the series.

Sunako thinks about killing somebody.

Sunako is a morbid girl so most violence and gore is associated with her.

Swearing is common words like sh*t b*tch and a single use of f**k

We see characters smoke in the opening titles and maybe rarely in the series.

Sunako is sometimes seen in a ghostly way with glowing red eyes.

We sometimes see gory things from the imagination of Sunako