Sora no Otoshimono's current manga arc could be the best so far, as compared to the Chaos arc. With the angel, Hiyori that Sugata once saw at Synapse being in the real world, joined their club and confessed to Tomoki earlier on, the plot really thickens from there on. In the latest chapter, Hiyori got banged down by a truck in front of Tomoki, while he was going to reply to her confession, after being clueless since he was never confessed to before. Hiyori's body then starts to disappear, along with the memories of her in the minds of the others. Sugata realises that and rushes into Synapse's dome and sees the angel Hiyori waking up. Hiyori knows who Sugata is but Sugata had already forgotten about her. It seems that the angel Hiyori had been experiencing a dream in the real world and that the human Hiyori in the real world was her dream self and thus the memories of her were erased from the others. Tomoki tried to resist the deletion of her memories and goes off to find Sohara, but she had forgotten her as well. Tomoki then sees Nymph and Ikaros's expression, and knows that they do know what exactly is happening. In tears, Nymph says that she cant tell Tomoki as anyone who knows about the reality must be deleted and if she tells him, he might start to notice something, which Nymph ends by telling him that Hiyori is not the only on that is "not" real. Tomoki then loses his memory totally.

the manga can be funny at times, but when it comes down to seriousness, this manga is pretty much awesome, plot development is really great here and their arcs are just wonderful.