Gensou Meimeiki
The Record of Fantastical Nomenclature·幻想命名記
A boy named Iori Midorisawa has the ability to see creatures that others cannot. He once drew them, but after a significant event, he stopped entirely. A woman named Mika, who is an author, approaches him with a request to work on a project involving the unseen—documenting the invisible and safeguarding the mysterious.