It's simple, 2 couples had a meeting in restaurant (same day, same time), but they switched partners by mistake. So pure girly ended up with sadist Yuri and masochist girl ended up with brown haired guy.
I thought the blond girl at boy are siblings AHAHAHAHAH because the parents looks like them
Thanks for explanation, I didn't read the description before reading it HAHAHAHHAHAH
It's simple, 2 couples had a meeting in restaurant (same day, same time), but they switched partners by mistake. So pure girly ended up with sadist Yuri and masochist girl ended up with brown haired guy.