A female character is shown wearing panties (sensitive regions are obscured) as a running gag. Other characters scold her for it and throw clothes at her to put on.
A well-endowed female character is shown adjusting her swimsuit suggestively through closeups. She is then shown with suggestive camera angles as she runs and flirts.
A male character goes to a sauna wearing nothing but a towel only just covering his genitals.
A female character wears a tight t shirt, making her breasts stand out. Characters make comments as the camera zooms in.
A male character makes a comment about a female character's panties when she doesn't realize he can see up her skirt. Nothing is shown.
An adult female character is said to have a "kissing bug," and kisses a high school girl without consent. The high school girl reacts in shock. Played for laughs, but uncomfortable given the age gap.
One female character mockingly refers to another as "Barely a B."
A male character shows another male character a picture of a female character posing naked in a hot spring. Cleavage shown, but mostly obscured by steam. Other male characters try to look at the picture, making comments about the woman's body.
In one episode all the guys are at a sauna. Many instances in this moment there are a couple guys that get out of the sauna and their genital area is always covered by something, so you never see it. However, you do see their bare buttocks.
In the same episode, one of the guys realizes on the other side of a wall or fence is the girl's section of the sauna and they try to find a hole they can peek through. The episode shows these girls in the water and sometimes you see a lot of skin, but you don't see breasts or genital area or buttocks. Maybe a little cleavage.