probably yes, the ova is kind of Side story from what i hear its tell the story how Klein got chosen as you know the protagonist

estimated 2021, but from what i hear author gonna release new book first unrelated with Lotm i guess he use this book for some experience and resting for Lotm. ah also after lotm 1 end there is OVA chapter of it, it will tell story, what happend inside the dreams of peoples that stuck in the cocon, there is 7 or 8 chapters of it, i dont now will CKtalon post it in here.