Why Should My Best Friend’s Love Debts Cost Me My Chastity Points?

[System + Quick Transmigration + Wild Imagination + Strong Female Lead + Love Triangle Showdowns] Jian Ning and her best friend transmigrated at the same time. Her best friend was bound to a hunk-collecting System. With no other choice, Jian Ning picked a scumbag-detection System. Scumbags, stay far away from my best friend, all of you!!! Scumbag! If one shows up, I'll beat him. If two show up, I'll beat them both! But her best friend's System has been corrupted. This world is full of danger. She seems to have changed, and yet somehow she hasn't. When their goals differ, how will they choose?