SPSD-83 Heroine's SAGA #2: Mask Hunting!

"There's clearly someone dangerous in this town..." In this town, which is the same setting as #1, there is a man who lives simply to become stronger. He has a trauma that has made him afraid of fighting men. While on his daily run, he encounters a monster, and while battling his past trauma, the man defeats the monster and challenges Aurora, who has come to defeat the monster, to a "sparring match" to become even stronger. What will be the fate of the three heroines who end up fighting the "man"?