Krampus

 “Well, my friend, it’s time to work.”

“What kind of Isekai is this, if I have to transform into a children eater monster?”

“I know, I know. Since truck-sama sent us here, life has been weird, but see it like this: you just have to be a monster and eat children once in the year, while I have to be a girl everyday.”

“Do you think I don't have remorse about my work?”

“I'm sorry, I didn't mean to…! It’s just that… Even after sixteen years, I’m still struggling to my role as, well, as a woman of the Santa Family and… your fiancée.”

“Mmm… Well, I…”

“Don’t worry. I decided to accompany you because you did seem stressed after your monster's debut last year and I want to be your support.”

“Thank you. You are such a good friend.”

“Well… I also want to change that.”

“What do you mean?”

“You see, since our gender was swapped when we reincarnated here, I have been curious… And even if it was decided by our new parents, we are a couple, so… I was wondering if… Well… You see… If… Maybe… I can comfort you with my body after your stressful job has been done.”

“You mean?”

“Please, don’t make me say it with other words, it’s embarrassing… But… Yes, our first time… as a couple…”

“I’ll clean this city ASAP to guarantee you a merry first time!”

“I count with you, my beloved Krampus.”