Mayuko-chan confesses to Taiki-kun on the school rooftop, but unfortunately Taiki-kun only likes taller girls. However, Mayuko-chan doesn't seem to think this is a problem, and the next day, she turns up to the rooftop, somehow much bigger! How will this this budding romance turn out, and how big will Mayuko-chan grow for Taiki-kun's affections?

Upon getting into an elevator with a girl, her breasts begin to expand. Is this elevator going slower than usual? One way or another, this is going to be a long ride, and you're going all the way to the top~

Three Bonus Stories featuring GTS Growth + Expansion, Muscle Growth and Weight Gain/Water inflation respectively. Enjoy a relaxing trip to the beach, or just some new and exciting play with your always incredible slime girlfriend in these three short bonuses to the main series.

With your Slimegirl girlfriend at full power, it seems like there’s nothing that can stop her. But, if she loves you, is there even any need? It sounds like she’s just gonna keep growing and growing, but she has an idea to spread the love as well.

It’s your first date with your Slimegirl girlfriend, but she’s got a surprise for you. She’s been growing and growing all this time, and decides it’s finally time to show you just how gigantic she’s become.

Arriving home, you find an unusual sight. The colleague you’ve had a crush on for years is standing in your apartment, completely nude, and making very forward advances on you. She even seems to be able to grow taller like you’re slime girlfriend. Is she behind this somehow?

Having grown and grown and grown, there is now a layer of slime covering the floor, and your girlfriend seems to be able to form as many bodies out of it as she desires. You’ve got your very own harem of slime girls, all ready to pleasure you however they can. And, of course, she’s still growing.

After coming home from work, you discover the slime girl has gotten shorter. Has she shrunk? But, no, instead she’s simply split her body into two, and now you seemingly have two slime girlfriends to look after you.

Your life with the slime girl continues, and she’s keen to grow bigger and each time her huge swelling breasts and butt seem to turn you on, she’s there and ready to attend to you. But, with all this growing, is she going to outgrow you?

It starts with a ring of the doorbell, and a strange package. "Grow your own Slimegirl! Just add water!" But, after her first growth she begins to move and talk, and seems keen on pleasuring you, as well as growing even bigger.

Upon meeting your childhood friend for coffee, something strange begins to happen. Is she, growing bigger? But, she's always been the same height as you, hasn't she? And what about your girlfriend, or your little sister? How tall are they now? They seem to get taller each time you remember them. What is going on?

Ellie is a witch in training who's always wanted to be taller. With her possessed hat Drumins, she sneaks into the potion lab to make an enlargement potion, and it works far better than she had expected as she begins to out-grow the school!