Love this sequel. It shows how Anna feels guilty of tying Mitsuru to him and cause his suffering while the latter on the other hand, is feeling guilty as well for not being able to do more to protect the former. I love how their love deepened more on this story.
2) Smoky Nectar Renew (sequel) (Mitsuru X Anna became lovers )
3)Domestic Beast(spinoff ) (took placed 2 years after renew