7-nenme no Junai

Junku and Ai have been dating for 10 years and have lived together for 7. Every day they eat their meals together and have sex only on important dates, this was the common daily life in which they lived. However, on a certain day there is an opportunity of job transfer to Ai. Junku wants to support Ai and decides to try a long-distance relationship, but in the middle of this process a guy appears who says he likes Junku and… (Source: NewPOP, translated)