I'm not sure about the exact plot of 'Hamari Love Story' as it could be a specific story within a certain cultural or personal context. It might be about two people in a romantic relationship, facing challenges and joys together in a way that is unique to their story.
Blade Fangs was a Japanese manga created by Itagaki Keisuke. There were four works in total, namely Grappler Blade Fangs, Fanma Blade Fangs, Blade Fangs Path, and Blade Fangs Path 2. The theme of this manga was hand-to-hand combat, and it told the story of the young Blade Fang fighting with strong enemies in various underground arena competitions. The characters in the Blade Fangs series had distinct personalities, compact storylines, and unique styles. This series of comics was well-known in China and was welcomed and loved. The animated version of Blade Fangs also had two seasons and could be watched online. As for the viewing order of Blade Fangs, they could be viewed in the order of Blade Fangs 1, Blade Fangs 2, Fanma Blade Fangs, Blade Fangs Path, and Blade Fangs Path 2.
There's no way for me to know exactly who the main characters of 'Hamari Love Story' are without more information. However, in a typical love story, they could be people from different backgrounds. For example, one might be from a wealthy family and the other from a more modest one. Or they could be from different ethnic or religious groups, and the story could revolve around how they navigate their relationship despite these differences.