Viper M1 is an H game in the Hyper Viper Animation series for the PC

Personal computer

A personal computer is any general-purpose computer whose size, capabilities, and original sales price make it useful for individuals, and which is intended to be operated directly by an end-user with no intervening computer operator...

 released in 1998. It consists of three separate entries.

My Mothers

In My Mothers, the player assumes the role of Mika, a young Japanese student who fights the forces of evil with the help of a sex-powered suit, due to the abduction of her boyfriend at the start of the game.

Green Boy

In Green Boy, Natane, who along with her older sisters, Kazumi and Namiki, run a flower shop. One day, a mysterious man arrives and sells the trio a seed

Seed

A seed is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth within the mother plant...

in which a male humanoid plant emerges. They then plan on using him to gratify their sexual needs.

The May Works

Finally, in The May Works two rival alien invaders compete to turn Maki, a young female student, into a galactic incubator.