Yeah, volume 3 has another 5 chapters but it seems chapter 49 is the last one. Hopefully they don't do the whole "apart for a long time, reunite and then end" since every fucking romance manga ever has had that formula.
While tenderly embraced after their two week absence from each other's side... his mother walk up and witnesses a 20 year old woman passionately kissing her 13 year old sun in an airport.