Koukou Debut, Dengeki Daisy Recommendations
Both have as protagonists a tomboy girl with a very energetic and optimistic personality, and willpower. She ends up being helped and protected by a serious good looking boy, and starts to get along with him everyday. The boy, who in the beginning only had the goal of helping her, actually starts smiling around her, and slowly changing, opening his heart, while the feelings between the two start to grow. A lot of comedy and sweet moments:)
Both girls end up falling in love with someone they're not supposed to fall in love with.
both deal with Strong, sporty & funny girl + popular, cool & tsundere bishie
In general, both series has a decent amount of relationship building and appeals to a variety of shoujo tropes. The main female character also has similar personalities and builds meaningful connections with others throughout the course of the story. Both series are well known for some classic drama. However, Dengeki Daisy also appeals a bit to mystery as the plot is unraveled. However, Koukou Debut has more romance dynamics especially in regards to the main male and female leads.