I feel like in the next chapter or so they'll explain what the hell happened, probably something about him getting a second chance like turning back time from when he proposed to the first girl but was humialted instead and etc... So he came back to make everything better, revenge, or whatever. I like it so I hope for more chapters soon since it seems interesting already. I also like he already proposed to the girl he loves unlike other manga where they take like ten years before they make it official.?