There is a scene where the characters are shown swimming in bathing suits

In another scene, there is a fantasy montage where the female character's clothes dissolve, showing full nudity, however, this isn't explicit at all, and is from a distance.

Scenes from an erotic game with a man sucking a woman's breast are accompanied by moans and innuendo during one episode.

In the beach episode, Sena reveals her bare breasts for a few seconds.

A decent amount of fanservice in every episode, most of it involving girls in skimpy outfits or swimwear, with close-ups on their breasts and gluteus maximus.

The english dub dvds are slightly edited for a few crude jokes

There are moderate to strong sexual references referring to breast size, perverted males and pornographic games. Some are comically bleeped.

Malaysians version are edited even further than the US dvds

Some mild slapstick and over-the-top punches.

English dub: PG to mild PG-13 language such as "damn", "hell", "bitch", "ass", "pissed", etc. One memorable use of "fuck" in the season 2 finale.

Japanese subtitled version: The word "fuck" is used in English on one memorable occasion in season 2. Otherwise, the same language as the English dub.

None.