Goodbye, Overtime! This Reincarnated Villainess Is Living for Her New Big Brother Volume 3 by Chidori Hama

After her quest for the perfect gift for Alexei’s birthday led her to purchase a glass workshop, Ekaterina must now learn how to manage a company. She has no intention of letting her new business weigh on the duchy’s finances and is keen on turning a profit by making the glass pens from her past life sell like hotcakes among the rich and powerful! Since summer vacation is coming soon, that should provide her with all the free time she needs...or will it? When Alexei and Ekaterina return to their main residence in the Yulnova Duchy for the holiday, their trip home may prove more eventful than they expected!