Ima guess the cranes are both bragging or singing the praises about their SOs, not noticing that both of them are present and close enough to hear.
Don't forget while being drunk so it PAINFULLY honest as well
Angel...An angel...What? You still want to drink...?How many did you have...?Our kouhai (lovers) are so cute!!!I see...Hee hee, let's have one more round then and head on home.Aw man~, I really want to see Kaga-san now~1st CarDiv happened to be sitting in the far corner and having a drinkBut... Having someone you've admired all your life, praise you is wonderfulAnd most of all, being together with her makes me very happy.