How to Clear a Dating Sim as a Side Character (Pre-serialization)

Note: Promotional oneshot for the novel.
When I opened my eyes, I found my soul synced into the popular dating sim game, ‘Midnight’! And although I was clearly one of the female protagonists, I possessed the body of Evenes Harin, the saint who is treated like a trivial extra. What’s worse is that I must pursue one of the five male love interests and see it through to a happy ending in order to complete the game.Having attended the triple combo of an all-girls middle school, high school, and university wasn’t enough of a debuff, having unintentionally put up an iron defense, I’ve been in ‘forever alone’ mode for 25 years. On top of that, I’ve possessed the Saint seldom played due to her atrociously difficult route! This life is screwed up, and I’m sure of it.“The more you look at it, the more novel this situation is.”
“...?”
“How would you feel about living here like this?”Boasting a 99.9999% probability of a bad ending: the obviously crazy Archmage.“Evenes Harin.”
“?”
“Now I’m sure you serve the devil. Or are you really crazy?”The epitome of rudeness: the seriously narcissistic Crown Prince.“I’ve made up my mind.”
“Shut up.”
“I’ll make you into my first doll.”Instead of wrinkles on his brain, it’s full of blooming flowers: the yandere Merchant Union’s director.“...”
“... Do you have something to say?”
“(shakes head)”At the level of a shadowy human, a man of few words: the underworld guild leader.At the lowest level, the most ordinary one is the empire’s youngest swordmaster: the knight commander...“Lady Saint.”
“Yes.”
“When I’m together with my Lady, my heart feels at ease.”
“... Ah.”
“I feel like I am one with Lunium.”As you can see, he is a zealous follower of the Temple of Lunium.“Would you not like to visit our house?”
“... Your house?”
“There is something that I would like to show you. Only to you.”And even the duke’s daughter, who can be called the true heroine, is acting like this.... Will I really be able to complete this game without any problems?