My Childhood Friend Who I Used to Train Swordsmanship With Became a Slave, so I, as an S-Rank Adventurer, Decided to Buy and Protect Her

S-Rank Boukensha no Boku wa Kanojo wo Katte Mamoru Koto ni Shita, ssho ni Ken no Shugyou wo Shita Osananajimi ga Dorei ni Natteita no de, 一緒に剣の修行をした幼馴染が奴隷になっていたので、Sランク冒険者の僕は彼女を買って守ることにした

A brief description of the manga My Childhood Friend Who I Used to Train Swordsmanship With Became a Slave, so I, as an S-Rank Adventurer, Decided to Buy and Protect Her: Ryunoa Styler, an S-Rank adventurer and second-generation sword saint, meets up with his childhood friend Aine after learning that she has been sold into slavery. Ryunoa buys Aine in an effort to save her, but she has a cursed collar on that sends the user into a “heat” once per day. The struggle for Ryunoa to find a means of removing the collar has begun! Show more