Lf Doujinshi: crossdressing, group, harem, tomboy, tsundere, hetero, sewing, multi-part, blonde, big breasts, big penis, creampie, secret, long, dorm, dormitory, apartment, department, girl-only, female-only.
I once read a manga that was about this blonde crossdressing guy who secretly infiltrated into a female-only apartment/dormitory, he was studying something about sewing or fashion-related? and the girls were unaware. There were three different girls, the first one was a gyaru/tomboy who was really into sports, second one was an idol/cheeeleader/popular tsundere and the third one was a mature senpai-type secretary? character. during each chapter, each of the girls discovered the truth about the protagonist and intercourse ensued. the girls were pretty fascinated for the size of the guy, the sports tomboy had sex with him on the bathtub on the first chapter and the secretary senpai was really sexually frustrated and was really angry to be last one to realize the truth. I've been looking for this like crazy, thanks in advance.