Shunsuke Noro

Haruhi accidentally changes Kyon into female. The consequences of that are more grave than you think.

Present day, present time. For some reason, rare newborns get swapped with the newborns from another world. They have the features of legendary creatures(like dwarves, oni, harpies etc), however, they lack the abilities of their legendary predeccesors. Our heroine, an elf girl Kazamori suffered through her childhood because other kids expected her to wield magic like a true elf. She tries to uphold her "magic user" image in high school but the person who finds out her secret is an ordinary human who practices magic-like science. Wikipedia

Kouya is reunited with Manaki, a girl he used to play with when they were little, for the first time in nine years. Even though they've lived far apart, Kouya's feelings for her have been growing through their social media exchanges, and he decided to take the opportunity of their reunion to reveal his feelings to her! But she has a secret...?