Thank you for the translation. And don't worry about the previous group they announced on the subreddit a few weeks ago that they are unable to continue translating this manga and its free for anyone to pick it up
Wait that doesn’t make any sense.
Haruto’s birthday is in August.
Himeko’s birthday is in January.
After what Saki said about wishing she was a year older and assuming her and Hime are of the same age, Haruto is a year over Himeko, but they’re non-twins siblings, which means they must be at least 9 months apart.