So what's the difference between normal and dark?

Base +6

Sadayo Kawakami is really cute.
But
奶子再大，不揉無用。
母乳再多，不吸無用。
No matter how big the girl's breasts are, they're useless if no man to massage them.
No matter how much breast milk the girl has, it's useless if no man to suck it dry.
爆乳美女的乳頭不但要多吸幾口，還要換個姿勢多吸幾口邊揉奶子邊吸乳頭才對，噴汁的母乳吸吮的時候還要加上口內特寫如下圖：
Not only should the man suckle at the nipples of a busty beauty multiple times, but he should also change positions and suckle even more while kneading her breasts. When suckling at the gushing breast milk, you should also add close-up shots of the inside of his mouth, as shown in the picture below:

https://e-hentai.org/s/87d789316b/3664935-16

不吸乳頭，我最多只會給2星評價，連奶子都不揉，最多給1星。
If the man don't suckle her nipples, I'd give the gallery a maximum of 2 stars; if the man don't even massage her breasts, I'd give it a maximum of 1 star.

Base +6, buttfarty -15, 11182224qa -6