Nov 16, 2020
ok
touya - 24 (jan 18, born first, same year as fuyumi, irish twin w/ fuyumi)
fuyumi - 23 (dec 6, born second, same year as touya, irish twin w/ touya)
natsuo - 19 (july 1, born third, 3 years 6 months after fuyumi)
shoto - 16 (jan 11, born fourth, 3 years 6 months after natsuo)
current period of time in manga: approx. late march
touya and fuyumi are ten months apart
natsuo will be 20 this year, fuyumi will turn 24
irish twins: to be born within 9-12 months of your sibling
hope this helps fuel ur headcanons
