probably regular college campus stuff. sol is clear on her feelings for him now (and will think abt the kiss too, probs), so there will likely be some other girl around to make sol jealous, and since she's pushed sunjae away before this she'll feel bad clinging to him again but she's worried so she'll do it anyway...then sunjae will question her 'i had a bad dream' comments and probably deduce that she's from the future himself without her telling him......there will be typical sunjaesol-esque angst but given that sol is clear on her feelings now i think they'll date as college students, which will get rid of sunjae's depression in the coming years...we'll get more info on the 2009 accident which i think is related to sunjae's death in the og timeline....i hope taesung is there in whatever capacity LOL