Kanojo Okarishimasu 30 Summary was translated by BakaData.com
Kazuya still can’t believe that Mizuhara actually has a real boyfriend, but he also thinks that someone like her not having a boyfriend is weird as well. The guy with Mizuhara is called “Umi”. Kazuya decides to stalk them, and he still isn’t sure if it’s her boyfriend or not.
They go to the movies, have lunch, go to a bookstore, go to a fortune teller, and then go shopping. As they are shopping, people around them call them a good looking and an ideal couple.
He realizes that they haven’t hold hands together, but says that couples that get along don’t hold hands (he remembers when he held hands with Mizuhara) because their feelings are connected.
Mizuhara complains that Umi should have written what he wants to eat tonight on the whiteboard at the entrance. He apologizes that he’s busy in the morning, and she complains that he's always talking about work.
Kazuya: “Sleepover? Are they almost living together…? Let’s stop this… it’s decided…It’s decided.”
Kazuya starts to cry and his friend Kibe texts him Merry Christmas while he’s in a washroom. Suddenly, next to him, Umi appears. Umi gets a call from someone and says he’s with her, and that her appearance is top class. He gets asked about the costume and says that he will later check her body measurement.
Kazuya gets angry as he suspects that Umi is using Mizuhara for some shady and dangerous business.