Hayate the Combat Butler (2007) : 2x5

Maria explains how Nagi developed an inferiority complex due to her short height causing her to frown most of the time. Kazuki, Ayumu Nishizawa's younger brother, confesses to Nagi about his love for her and asks if he is able to take Nagi on a train ride, though it becomes a date. At the end, Kazuki says that they should do things like this again. Nagi says that it is impossible because she already likes someone, but Kazuki says he has not given up. Back at the mansion, Nagi becomes dejected because Hayate has not become jealous about her date with Kazuki. Later, Nagi takes a bath, with Maria helping her wash her hair. Maria leaves for a bath towel, but due to a sudden visitor, she asks Hayate to bring a towel to Nagi. Hayate walks into the bathroom and accidentally sees Nagi naked. Hayate asks if Nagi is mad at him, and she says she is, but she says she forgot why she was mad, and kisses Hayate on the cheek.