Hana to Konjou: Boudai Danshi no Koishimashita.

Kitayama Hatsuki works part-time at a flower shop where she met an intimidating “officer” - Takamiya Ryo. As it turns out, he is the brother of the owner, currently attending National Defense Academy, and was just teasing her with the scary act. Their clumsy flirting is super cute.