Gosu's Lethan

When Mr. Joo and Mr. Young tried to have sex, things went awry due to Mr. Young being too big down there. Eventually, Mr. Joo gave him a second chance due to how besotted Mr. Young seemed to him. The meticulously prepared Master's Lesson is finally starting! **Original Webtoon:** [Ridibooks](https://ridibooks.com/books/4895001274), [Naver Series](https://series.naver.com/comic/detail.series?productNo=12126245), [Bomtoon](https://www.bomtoon.com/detail/masterslesson), [Lezhin](https://www.lezhin.com/ko/comic/gosu_lesson), [MrBlue](https://www.mrblue.com/webtoon/wt_000065771), [BookCube](https://www.bookcube.com/toon/detail.asp?webtoon_num=250081)