Kaguya-sama wa Kokurasetai: First Kiss wa Owaranai

Kaguya Sama and Horimiya share some similarities such as a focus on romance, a high school setting, character development, humor, and emotionally impactful moments. 

The similarities between the two are present throughout the entire series, but appear more prominently in the movie. Both are fundamentally about the construction of an ideal self, a persona that is shown to the world, while concealing internal feelings and the true self. Both show romance as a struggle for similarly ambitious minds, finding resolution through authenticity. One is shoujo while the other is seinen, but both are romantic comedies with a dose of drama and just as much wit as their leads, and a supporting cast that is multifaceted and interesting enough as to not let the two leads become overbearing.