Not understanding anything what's happening is it seme view?

No they have been raincrated

not exactly reincarnated, i mean like seems like the past was a dream though the uke seems to remember everything .

They've regressed to before they met. Started their lives over, in a sense, but Aeroc has his memories of the first play through while Clough only has glimpses via what he thinks are just horrible night terrors. The second season is mainly through Clough's POV.