Koharu Hush-A-Bye Mayonaka no Kaunseraa - Ch. 2

[MangaDex]

 

[Mr.Archer]

In this series, if it looks like a duck, walks like a duck, and quacks like a duck, then it's probably a ghost.

 

[xanon]

And they were together forever...because she wouldn't let him go.

 

[Voyvoy_]

Nice twist on that

Spoiler

"They realized they were dead because of ghost story telling!!" thing, I have seen it in Japanese ghost stories sometimes (both in manga like Scariest Tales of Horror and that one Takahashi Yousuke manga about nightmares, and in live-action series like Kaidan Shin Mimibukuro)