Izumi and Haruto are the lovey-dovey air-headed couple ever. I'm glad they met. Izumi was rob from his old apartment(which was upsetting), but thanks to that Izumi wouldn't have met Haruto. Haruto is not really good with communication to people and has an expresses less face. But, everything change when he met Izumi. Haruto expresses himself and has a cute personality. I definitely love them so much. In vol.4, Haruto old classmate, Ichimaru showup. It was so exciting, troublesome, and awkward.
There's Jin and Momo's relationship. I can't believe it that it took 10 years for them to be together, Jin wanted to be with Momo so bad, but Momo keeps pushing him away. Then, Jin goes to his grandfather's funeral. Jin has some family issue, which makes Momo nervous. Momo was worried and went back to his hometown to visit Jin. Jin and Momo met up and shock to see Jin have injured because of an accident. Jin and Momo speak for a while and finally, Momo decided to date Jin.
The two female neighbors, Hazuki, and Ayano are understandable, cool, and funny women. They help out with Izumi and Haruto's relationship also Jin and Momo. As for Ichimaru, I wish him luck to find a lover soon.
Heart no Kakurega