From left to right, characters appear to be:

- Fujimoto Yui (f) (twin 1)
- Fujimoto Nao (f) (twin 2)
- Onodera Ena (f) (their friend)
- Fujimoto Tatsuhiko (m) (the twins' father)
- Either Yoshida (f) (Tatsuhiko's friend) or the twins' mother (f), whose name I don't recall and can't find a source for (they have slightly similar hair and it's hard to ID someone who's that small and half out of frame.)

I've updated the tags appropriately (I hope)!