Comment by k on Bad Thinking Diary - Chapter 37

da** hyera is really out to get her , was she really that badly hurt from her sunken relationship with yuna in highschool ? there's 2 ways this could go and how it is now 
so basically hyera is in love with yuna and wants to date her using the worst methods imaginable (like trying absolutely everything she can to "break" yuna's love towards minji) OR hyera is already over with her relationship with yuna and she knows she has no chance with yuna however she wants vengeance over her heartbreak from highschool (I guess she just doesn't let go) and knows that yuna kinda did it on purpose and now she's actively trying to hurt yuna by sinking their ship by any means possible
I think the latter is the most probable because it also explains why she's trying to make her sleep with other girls instead of her and also why she's using min-jae (red hair girl or smth) against yuna and not minji (although that also afects minji indirectly)
that's pretty evil , and this might be justified by hyera having ego issues , but this is also happening because yuna was trying to cope with her love 
either way we need more developement and chapters on hyera to confirm some of this stuff , this is the way for bad thinking diary to get good
finally we're getting good writing from bad thinking diary , the story and connections are becomming more intresting