Hikikomori Reijo Nanoni, Kori no Henkyo Haku no Hanayome （※ Kikan Gentei） ni Erabarete Shimatta

Adoted by a Doting Frontier Count and His Fluffies?! My Fiancée (Trial Period) Life Begins!

Lilybell is a shut-in noble lady mistreated by her older step-sisters. One day, she is forced to accompany them as a maid to a party where Count Elias, the Lord of the Frontier, is set to choose his bride.

However, her secret pet, Goran-chan (a mandragora), suddenly bolts into the venue! While Lilybell is frantically chasing after it—

"This person shall be my 'Bride Candidate'!"

The cold and blunt Elias points her out "at random," and she finds herself forced into a one-month trial marriage...?!