Good Morning Call (2001)

One year has passed since Nao and Uehara accidentally moved into the same apartment. Since then, they have become an official couple. With Uehara's 16th birthday coming up, Nao's biggest worry is what to buy him. Everything is going smoothly- that is, until Nao realizes Uehara's birthday has already passed and she spent it acting as a cut model for the handsome hair stylist, Asai.