Responses
this is not MC and ML from second timeline reincarnating again. This is ML from 1st timeline reincarnating (or getting the memories from first timeline) while MC remembers nothing (because he is not the same as MC in first timeline.
Basically, this is the reverse of second timeline. MC and ML who are both from the first timeline will never meet again

is there any foreshadowings mention about this timeline?? The ending was good enough. Why do the side chaps need the third timeline instead just give us fluffs of all members adorable moments????