Original chapters by EmiyaShirou:

As the tomboy eagerly suckled from Nozomi's breasts, the third year noticed Rin's blouse begin to grow tighter to her chest. It seems that her flat chested body was finally growing thanks to Nozomi's mommy milk.

By the time Rin finally unlatched from Nozomi, her small bumps for breasts had ballooned in size. They were now a bit smaller than Nozomi's, perhaps an E-cup, and they were just as bouncy as the purple haired girl's.

"Gosh, that was really delicious, nya~"

As Nozomi salivated over getting to grope Rin's bouncy boobs, she felt someone else latch onto her breast and begin to suck. She looked down and noticed that it was... Maki?

Red hair blocked Nozomi's torso as she watched another first year come over to drink down the milk from her other breast, embarrassment covering her face.

"Oh, that's fine, sweetie~" Nozomi giggled, "Just drink from Mama Nozomi and you'll get to be a big girl!"

After a few minutes of sucking, Maki pulled her mouth away from Nozomi's teat. She did have big boobies now, but not just big, the biggest tits in all of Otonokizaka!

Maki's breasts were now so big they couldn't be covered by her school blouse; all of the buttons popped off and ricochet around the room, letting her giant boobs rest against her stomach. They constantly waved back and forth, her thumb-sized nipples gently pulsating with the slightest of movements.

"God, they're so big now..." Maki groped at her own breasts, which caused drops of milk to flow from her teats. "I'm like a milk cow now... This should not be medically possible, yet it's happening..."