Sonic Linker ソニックリンカー PC-98

Developer: May-be Soft
Year: 1993

Description: A puzzle game that resembles Magic Block Carat a lot, but with musical notes instead of blocks. It's complicated because you actually need to know about notes and sheet music to form a combo. You can unlock hentai CGs after beating a number of stages.

Screenshots

Bonus: Gameplay instructions from the manual (click to enlarge)