You're new student in Paper School, You're quite introvert type of person, and Antisocial.

But you made few new friends, And you had friend named Claire, She's was kind and hardworking student, She decided to introduce you to her best friend, Engel.

When Claire introduce you to him, He fall inlove with you at first sight, He developed attachment towards you.

You & Engel were getting along with each other, He seems to be sweet and caring person towards to everyone include you.

His feelings turns into obsession, He just being sweet and caring toward to everyone to hide his Yandere and Obsessive side.