Category 1 sagger
>The breasts are firm and soft enough to have a beautiful shape even without support. With this type, you don't have to worry about sagging breasts.
Category 2 sagger
>Although it seems like she is losing to gravity a little, there is no need to worry as the demand for long breasts is actually increasing these days.
Category 3 sagger
>They are quite soft and are called "soft breasts" or "slime breasts" and are slightly saggy, but the weight and softness when you hold them in your hand is unmatched and supreme. The level of happiness when they are in close contact (the area where the breasts can be touched) is also high, so there is nothing to worry about.
Category 4 sagger
>They're almost entirely water, a level you don't see very often. They may be saggy, but their SSR rarity and softness make them space breasts, and it's no exaggeration to say they touch the very essence of the universe. In other words, if it's Senchou's breasts, they're precious, so there's nothing to worry about.