Yuusha Party ni Kawaii Ko ga Ita node, Kokuhaku shitemita.

In a world of magic, Yoki is reincarnated as a middle-level demon tasked with guarding the demon lord's castle. Unlike heroes or demon lords, Yoki finds himself in a less glamorous role. When the Hero's party launches an assault, Yoki easily overcomes them. However, the battle takes an unexpected turn when he encounters Cecelia, the beautiful cleric of the Hero's party. Captivated by her, Yoki experiences love at first sight. Overwhelmed by his feelings, he decides to confess his affection for Cecelia, setting the stage for an unconventional romance amidst the conflict between heroes and demons. The story explores themes of love, unexpected relationships, and the complexities of good versus evil.