Toumei Ningen

Main character is a science teacher with a weak constitution. He was working on a medicine to fortify constitution and accidentally got a substance to grant invisibility. To complete the original medicine he needs to collect women fluids, but as a side mission he's going to have a revenge on those who bullied him in the past.

Two prominent features of the work is dark palette graphics and isometric CG that require special glasses to watch properly. There is no story apart of synopsis so it's a one-sided erotic work.