Honestly, I prefer how they did it in the oneshot. It just seems a bit...strange? That even though this is the serialization and the previous one is the oneshot, this one seems rushed compared to the oneshot. I prefer him not confessing right after both of them almost died and suddenly running away. I like the one from the oneshot where we can see him struggling to say it and her not seemingly nonchalantly suggesting them going out and suggesting they get to know each other better as friends first. Not to mention how...little her reaction to his confession is compared to the oneshot, I mean sure, at the time she was most likely in shock from you know...almost dying(which is why he really shouldn't have said it then) but even when she came to his home she just goes, "You like me? Then, wanna go out?". Feels like considering all the things that happen today, I really think she should've taken some time to mull it over first.
Feels like there was a lot more emotions involved in the oneshot compared to the mostly abrupt development of this one