Anata to Saigo no Yakusoku wo

"Did you come here with the intention of living with me?" According to the letter of her deceased grandfather, Emma is a young girl who visits a certain person. There was a wizard named Felix with a beautiful appearance. Emma, who accidentally slipped and injured herself, decides to stay at the house of her grandfather's friend Felix for a while. The two of them live together quite normally. But Felix has a certain "promise" that can never be broken...? "Emma, turn around and look at me?" Is it my fault that I inadvertently take an aphrodisiac, get my first kiss, or want to go further ...? A lonely girl and a beautiful wizard young man with no reason. A story about a single letter connected to fulfill a gentle "promise".