Translated it, although I don't understand the joke in the left 4koma. The Japanese would be "juubun" (x10), but it doesn't ring a bell for anything that would make Koishi think that it's erotic in any way.

Meakashi said:

Translated it, although I don't understand the joke in the left 4koma. The Japanese would be "juubun" (x10), but it doesn't ring a bell for anything that would make Koishi think that it's erotic in any way.

It could also be a sound effect when people are giving head, so it's natural for Koishi to think that it's erotic.

Meakashi said:

Translated it, although I don't understand the joke in the left 4koma. The Japanese would be "juubun" (x10), but it doesn't ring a bell for anything that would make Koishi think that it's erotic in any way.

rather than Juubun, it's Juuppun which *very vaguely* resembles chuupun, technically a sucking onomatopeia