False Heartbeats of Love

This story is not a common romance, you will fall in love with the protagonists but you will also hate them.
First love is one of the strongest and deepest we experience, but what if, in addition to being your first love, it is one of the deepest and most real feelings you have ever had.
Can you love two people at the same time? Do all love stories have happy endings? Can you die of love?