torogao
A facial expression where the character appears to be in an ecstatic, yet quiet and unresponsive state of pleasure.
The cheeks look flushed, the eyebrows are slanted downwards towards the sides, and the eyes are half-open and moist, often staring into the distance. It is common to see saliva and a half-open mouth as well. The limbs and joints may be relaxed and hanging loosely in place. May also involve heavy breathing or a contented smile.
It is often sexual in nature, but not always. It may also be seen when a character is eating their favorite food, for example.
Not to be confused with ahegao, which is a more exaggerated expression. Torogao indicates trance-like pleasure.