Hatsukoi ni Oboreta, Hana wa Knife wo Mi ni Matou Recommendations
The first three chapters in Hatsukoi ni Oboreta are similar to Hana wa Knife o Mi ni Matou as they both contain a girl in love with someone that is already in a relationship with another girl. The girl excessively tries hard in order for the other to fall for her. Both females realize their work was in vain, and puts distance between them, but in the end, her feelings are reciprocated. Both works are by the same mangaka.