Sequel blight is an independent h-game developed on RPG Maker, by the doujin circle Leaf Geometry. It is composed only of hakika, who has developed many games over the years. The game is available on DLSite. You can find a (awesome) fan translation here.
Sequel blight is a huge surprise for me. I had really a lot of fun, the gameplay is solid, the dialogs are funny and the graphics are cute.