Hikikomori Reijou Nanoni, Koori no Henkyou Haku no Hanayome (※ Kikan Gentei) ni Erabarete Shimatta

Pampered by fluffy creatures and a frontier count!? A trial engagement begins! Lilybell, a shut-in noble girl mistreated by her stepsisters, accompanies them as a maid to a party where Count Elias of the frontier is choosing a bride. However, Goran-chan, the mandragora she secretly raises, suddenly rushes into the venue! As Lilybell frantically chases after it— “This young lady is a candidate for the bride!” She ends up being casually selected by the cold and unfriendly Elias, and is forced into a “one-month trial marriage”!? (Sana Scans).