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 (Associated Names)

An erot*c battle fantasy of swords and love starts! Lunois Styler, a second sword saint who is an S-rank adventurer, was reunited with his childhood friend, Aine, who has fallen into s*avery. Lunois bought Aine out to save her, but she is fitted with a cursed collar that causes the wearer to “go into heat”…