Tsuihou Sareta Kishizuki Seijo wa Kyou mo Shiawase

Sibel, the daughter of a count, has her engagement broken off by the prince for bullying her stepsister, who is apparently a true saint. Furthermore, she is banished to a remote area where monsters run rampant, and ends up working in the dormitory of the First Knights, who are protecting the area... However, in fact, Sibel loves knights with well-trained muscles! She went to the frontier with great joy, and now she is surrounded by the knights she admires, living a happy and joyful life as a dorm mother. There, she meets Leo, the commander of the knights, and begins to develop feelings for the humble and dedicated Sibel...!?　 What will become of the love between the innocent, carefree saint Sibel and the equally innocent Leo, who makes mistakes every day? A dream life surrounded by the perfect muscles! A life of cohabitation that will make you faint! (Source: Comic Pash, translated)