Ubuna Katabutsu Shodouka wa Okute na Kanojo to Koi ni Oboreru

After her childhood friend, whom she thought was her boyfriend, decided to marry someone else, Haruka eagerly began a marriage search of her own. Haruka fell for Eisetsu Amazawa, the handsome calligraphy instructor who saved her from harassment at a calligraphy mixer, and decided to attend his calligraphy class. One day, Haruka accidentally fell down and touched lips with Amazawa, for the first kiss in her life! She was upset about the accidental kiss, until Amazawa confided that he has never been with a woman before either....... (Source: Takeshobo, translated)