Tensei Shitara Daisukina Osananajimi Ni Kirareru Mob Yakudatta. Shita (Ruby) [Light Novel]

[Machine Translation] Although he was supposed to be reincarnated as a mob character, MERCHRIS accepts the overbearing doting love of his childhood friend Leonid, the son of a hero marquess, and becomes his fiancee. However, under the influence of Leonid's magical power in his body, holy magic power appears in Merkris, and at the same time, signs of the awakening of the Demon King appear in many places! MERCHRIS, together with Leonid and the first prince, is assigned to the task of defeating the Demon King! The heroine, who is confused because she is treated as a saint, escapes from captivity when she realizes that MERCURIS, who now takes the role of the heroine, is a reincarnated person! In order to get the game back on track, she plays a trick on Merkris...?

モブキャラに転生したはずが、幼馴染であるヒーローの侯爵家子息レオニードの重すぎる溺愛を受け入れ、彼の婚約者となったメルクリス。しかし、レオニードの魔力を体内に受けた影響でメルクリスに聖魔力が現れ、同時に魔王の覚醒の兆しが各地に出現!メルクリスはレオニードや第一王子とともに、魔王討伐隊の任に就くことに!?聖女扱いされ困惑していたら、今度はヒロインの役を担うメルクリスが転生者であると気づいたヒロインが、監禁から脱走!ゲームを元の流れに戻すため、メルクリスを陥れる芝居を打ってきて...!?