MRXD-011 Big dick boy Umao's plan to turn his neighbor into a masochist. - ~Summer Vacation Free Research Edition~ Rena Fukiishi

One day, a boy named Umao, who had not decided on a theme for his free research during summer vacation, saw the mature appearance of a talented madam named ``Rena Sensei'' who runs a private cram school in his neighborhood, and felt an epiphany. - To compete with my friend Miyashita who is raising beetles, I decided to raise this "neighborhood lady". - Umao, an innocent and free-spirited boy with a big penis that rivals even an adult's penis, spells out masochism through his picture diary from his summer vacation. This is a shocking free-research erotic drama about masochist training.