[Mochi] Fighter's Resolve Vol 1 - 3D Adult Comic

Reina and Aina started getting worried about Eiko when they noticed a big change in her behavior a few days ago. They felt like something was bothering Eiko. One night, as Aina was heading home, she happened to see Eiko walking alone.
Without thinking twice, Aina decided to follow Eiko until they ended up in a shady and grimy place, which turned out to be where street fights often went down.
In the middle of the crowd, Aina spotted Eiko getting ready to throw down with a notorious street champ named Mia. The big question is, why is Eiko going into this fight, and can she actually win against this feared street champ?