Damn... This is kinda hard to see, because you know it's going to be bitter-sweet the moment it all comes flooding back to him, for Chitoge, because he's been so pure with her in this state, and he's just going to end up his old self once he remembers, which is great because he'll remember her properly, but at the same time he'll go back to refusing to admit he likes her to himself and her, with their usual friction.
But, hopefully, this experience will make her even softer with him when that happens, because she knows somewhere in there, he does feel good around her. There's a part of him that likes spending time with her, and that she needs to be kinder to him and, just maybe, start expressing her true feelings.