Kakushiaji ni wa Sukoshi Amai Shitagokoro

Coffee shop worker Shun Hirayama is so handsome that customers praise him every day. However, he is fed up with being treated with contempt by a regular customer, Mao Nakadai. Then, one day, he meets MAO—a beautiful streamer girl—on a video site and falls in love at first sight. He is actually an idol otaku, and when he watches her previous videos, he discovers that she is a cross-dressing guy. Although he is supposed to be straight, Shun is perplexed by his crush on MAO, even though he knows he is the same sex as him. He then discovers that MAO has similar characteristics to Nakadai, the regular customer...!

(Source: Kaiohsha, translated)