Mamono wo Pet-ka suru Nouryoku ga Mezamemashita: Uchi no Ko, Kawaii keredo Saikyou desu!?

Synopsis

Tooru, an utterly exhausted office worker, is transported to another world. A mighty dragon is facing off against a knight right before her eyes! But when, by chance, Tooru brushes her hand against the beast, the dragon shrinks down in size!? "I see. So I can transform monsters into pets..." The knight she saved welcomes her as the "Saint of Salvation", but another saint appears and now there's a fake-saint dilemma!? Zyrad is smiling at her and saying "It makes me happy when you smile", the pet-ified monsters are getting attached to her... wasn't she supposed to be aiming for a quiet, happy life!? (Source: Kadokawa, translated)