Belle and the five Alphas

It begins with Belle excited to attend a boy band show for the first time, mostly when she has to see Julius, her crush. However, the concert suddenly becomes bloody when Julius throws a toy wolf claiming that anyone who catches it becomes his.
Belle is scared as a stampede happens, she witness people dead and accidentally finds the toy. Almost immediately, everything becomes normal and everyone pretends as though nothing happened.
Shockingly, she's declared the winner and suddenly the mate for the five boys. Belle isn't comfortable and wants to go home but Julius tells her she belongs to them.
She's taken away by them and becomes their sex slave but narrowly escapes through the help of a mask boy, the fifth member of the band.
It's 5 years now, Belle lives her life trying to hunt down these five boys but it's impossible as she ends up losing her team members. To worsen it, she has a curse.
Every 12 midnight, she becomes a beast and attack people on sight and the only way to break out of this curse is to murder the leader of the team, Julius.
Her last search made her lose some policemen and she's forced to resign while her father arranged a marriage for her with the president's son. Leaving the precinct, she suddenly finds a poster of the 5 boys hosting a concert in two months while intending to dig more into the boys, she's run over by a car.
Belle is brought to the hospital but it's 12am and she ends up murdering the doctors on sight. Depressed, she paced out of the ward only to encounter a stranger who is the replica of Julius.