need help finding this hentai

[senki667]

I do not have a picture since I have not read this I awhile. Its about a boy who lives next door in an apartment to a girl he likes. She works on a webcam that he secretly watches, midway through a masked guy breaks in and proceeds to start raping her on cam. The protag instead helping just masturbate s while watching until the guy shuts the came off. Protag gets near the wall to continue to hear her getting raped before the guy leaves. Ends with the girl standing infront of the protags apartment needing help to get untied.