Did Megane regain his memories by some miracle or did he revive with blank memories? I wis...

i think there's still a ch left about waki/megane story bcz i remember i read the raws somewhere :D n i remember the last page where all the family member took a family photograph

according to the mangaka in her notes, whether magane got his memories or not is up to us to interpret so she made it really vague and there is no conclusion.

There is an extra chapter where all the couples are present and Megane is with Waki and quite affectionate with him. From what I gathered from chapter 59, the fact that Shoui and Kotoha were the ones to give their blood to wake Megane must mean that he regained his memories because the same they did the same thing when Shoui wanted to wake Asari.

could be, but we shouldn't forget that Asari promised Shouhi and loved him, he choose to come back leaving Riikichi behind. Magane is different, but I do hope that i comes back with his memory (so sad for Gemna, his Himi came back blank)...

Not so sad I think, the first Himi had all those fears and traumas. The second one was like a second chance to do things right. Genma could treasure Himi from the very beginning without any misunderstandings. And even if Himi lost his memories he was still Himi, his personality was the same. And contrary to the others couples Himi and Genma didn't have any treasured memories together except for the rescuing in the lake one and a little more in Himi's last days. We could say it is a little sad but a little happy too. And they managed the situation quite alright.