https://www.dlsite.com/maniax/work/=/product_id/RJ403157.html
This is 4 works in a series in 1. See the work page for more info.
All 4 works have versions where the girl is and isn't wearing glasses, text and textless versions of each, and a weird peephole omake version.
2-77: Work 1 (渡辺○は実は…他校男子に凌辱されてるらしい(RJ210333)): https://www.dlsite.com/maniax/work/=/product_id/RJ210333.html
78-288: Work 2 (渡辺○に関するウワサ(RJ220366)): https://www.dlsite.com/maniax/work/=/product_id/RJ220366.html
289-386: Work 3 (失踪したアイドルから届いたハメ撮りビデオレター(RJ228192)): https://www.dlsite.com/maniax/work/=/product_id/RJ228192.html
387-502: Work 4 (渡辺○の凌辱日記(RJ231618)): https://www.dlsite.com/maniax/work/=/product_id/RJ231618.html