I will not give this stupid to my friends is so boring though about first love

 Chapter 15

However:used to introduce a statement that contrasts with or seems to contradict something that has been said previously.

Prevent:keep (something)f rom happening or arising.

Assiduity:constant or close attention to what one is doing. 

Incomprehensible: not able to be understood,not intelligible.

Chapter 14 

Meanwhile: in the intervening period of time. 

Melancholy: a feeling of pensive sadness,typically with no obvious cause. 

Chapter 13 

Embarrassment: a feeling of self-consciousness, shame,or  awkwardness.

Chapter seven seems like kill me.

Ch six is so shocking