ok so woori is in high school so m assuming that he is 18
and he will die 10 yrs later i.e age 28
since he lived 7 lives each time he died exactly on 28 excluding the one where subin pushed him off the roof
i.e 6*28 = 168
adding the one where he died at 18
18+168 = 186
(this calculation is wrong if we see from story's perspective)
but there is a catch except his pre-regression woori technically lived 10 yrs if u notice that cause each time he regress at age 18 during high school
so post regression he regressed total 6 times
so 10*6 = 60
and subtracting one regression cause he died on the same year prolly lived for few months so m excluding that regression completely
therefore 5*10 = 50
adding 28 from pre regression
28+50 = 78
so woori is technically 78 yrs old
aint calculating months cause m too lazy to do
i might be wrong tho ( ̄へ ̄)

someone do the math how old is woori