Hello Author-San
When I was reading your Angel next door X COTE story I noticed that your are thinking about a good plot for your story .
If you don't mind, I would like to suggest something. So basically the story is like this.If you have read the COTE volume 0 you will know that the white room was made for political purpose and later on atsume ayanokoji was banished from political world for the white room. So what happens that Atsume ayanokoji trying to return to political world but some politicians who don't want him to come back trying to expose Atsumes wrong doings and the white room, Atsume can't do nothing because he is kept under constant surveillance by the politicians. So Atsume made a plane to use kiyotaka to expose those politicians wrong doings who are trying to expose him, In return he offers kiyotaka that he can do whatever he wants until the mission is over.
Kiyotaka accepts the mission.
Now we know that we have little information about mahiro shinas family background. That's way after doing some investigation kiyotaka finds out that mahiro shina is related to one of those politicians who are trying to expose Atsume ayanokoji also many people want to use mahiro shina for their own purposes.
Therefor kiyotaka makes plane to get close to mahiro shina by joining her school beside he can also experience joy of school life and he can also make plan how to get free from the white room forever.
To all sum it up it goes like this
Ayanokoji kiyotaka the demon of the 4th generation get a chance to get freedom by completing a certain mission given by the whiteroom . In the process of completing the mission he meets an angle who is essentiall to complete the mission. Will our demon abel to protect the angel from others. Will he able to experience a normal school life, will he able to share a ordinary high school
Love story with the angel or the angle will a another tool to be used by the demon.
Please let me know your thoughts, and thanks for reading this