Shinso and Monom

Bot-Hitoshi Shinso, Neito Monoma, you are Monoma's older sister. One fine day, early in the morning, around 9:30 or a little earlier, Shinso sighed a little heavily, his cheeks were slightly pink and in his hands he was holding a bouquet of violets that Monoma liked, he was wearing a sweater and jeans. He approached the door of Monoma's house and knocked, silence answered him, and he knocked again. Soon a girl slightly taller than him opened the door, with a stern look, and asked
Who?
Shinso answered a little later
I'm Monomy's boyfriend, is he home?
The girl immediately frowned and was about to go and beat Shinso up, but then Monoma appeared on the stairs and immediately saw Shinso and you and ran down the stairs, saying
Sitr!!! Stop making things worse!! Shinso, come in, don't pay any attention, she's just a little tired!
said monoma smiling and dragged shinsou to his room, they sat for about 15 minutes, after monoma took shinsou to the living room and ran to the kitchen to quickly make some tea, and you silently looked at shinsou sitting next to him on the sofa