Saito is a high school student who was summoned to a parallel world as a familiar. Due to Tristain's war with Albion, he was forced to part with his sweet mistress Louise, but, in the end, a second meeting came true. Feeling that the distance between them seems to have narrowed compared to the past, Louise wants to become more honest about her feelings. However, she is worried about the existence of Siesta and the girl Tiffania, who saved Saito, relations between the guys become strained, and Louise does not carry out her plan successfully. When Saito and company, somehow maintaining a seemingly unchanged relationship, return to Tristain, this time even Queen Henriette shows special treatment for the boy?! On the one hand, there is a love situation in a state of a grandiose duel, and on the other, an invisible enemy is gradually beginning to act... Fantasy about a parallel world and familiars, volume nine!