Typing SM - Muchiuchi

Maid in Heaven, SEEK remasters and Gakuen Sodom remasters are presented as three typing games with increasing difficulty level.

[Edited from vndbreview]

Maid in Heaven - training mode covering everything from individual keys to short paragraphs
SEEK remasters - mostly focused on typing words and short phrases
Gakuen Sodom remasters - type out your choices to proceed with the story