To change from 'like' to 'love,' what strategies must Ozawa use on Hozuki?

Hozuki Heiji is the troublemaker. He gets into fights and is very cold to everyone. Ozawa Kii witnesses a fight between a classmate and Kazuki but he unexpectedly says he wants to become friends? And what's this about 'like' and 'love'...?!

(Source: Senpai Scans)

Included one-shot: Volume 2: Harinezumi no Harry no Ohanashi (pilot)