Union Academy: The Strongest (OP Female OC x Crossover Harem)

A Little girl named Diana looked up to the heroes of the world. She idolized them for their strength and prowess and longed to be like them...so she could pick up a boulder. Little Diana had lost her favorite blanket because one day, when she was having a picnic near a rock formation, a big boulder fell on her blanket and covered it completely; Diana wasn't strong enough to pick up the boulder so she started training like her idols and one day she was going to pick up that boulder!

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