Responses
Uhm...if it follows the LN...then...it's somehow considered Tragedy...what am I saying. It's indeed tragedic though...but I'm not going to write the spoilers here so if the manga follows the LN closely, then yes. The Tragedy Tag is needed because it plays a Major Part prior to the current timeline...

Yall, I wanna ask so please spoil me before I read: what does the tragedy tag mean for this book?