Please insert it in my ass-Minori Kawana

Minori Kawana is a young waitress struggling to make ends meet and pay off debts, including those incurred for her sick mother's treatment. She is taken under the wing of her restaurant manager, Yashiro, who offers to train her in anal sex as a means to an end, ultimately aiming to create a secret club where such services are offered. As Minori undergoes this intense training, she learns to accommodate and eventually enjoy anal intercourse, discovering her own limits and desires in the process.