[3][4] The song was written and composed by Jonathan Manalo and Gabriel Tagadtad; and was one of the BGYO songs—"Kundiman", "He's Into Her", "The Baddest"—chosen to be part of The Lunar Codex's "Polaris Collection" time capsules bound to the Moon in 2023.

[5] "He's Into Her" debuted on iTunes Philippines at number one, hours before its official release and it marked as BGYO's second single to reach this spot, after "The Light".

[9] The lyrics were written in English by Jonathan Manalo and Gabriel Tagadtad,[10] arranged and mixed by Theo Martel and mastered by Jett Galindo.

[8] JE CC of lionhearttv.net cited in his review "He's Into Her is a frisky, electropop ballad, that narrates that magical moment when stars seemingly get aligned, and the time becomes right for the romance to bloom".

[13] "He's Into Her" premiered on Star Music YouTube channel as a song's lyric distribution video and its official track was released worldwide via digital download.

[17][19] The music video was presented inside a campus wherein Gelo, Akira, JL, Mikki, and Nate portray students as they found a journal about young love.

[19][32] The opening scene features a school hallway accompanied by a strong harmonies of the track, then leads to the magical narration of the typical student's activities in the classroom, interspersed with the sleek choreography and dance breaks along with a book.