dammit moe panda scans, was ready to shit on the dad ('cause he obviously deserves and he still leaves because he is a coward, and if he finds another woman is higly likely he will f*ck up again)
but well, as Wahei is a friggin mature adult, he forgave him and at least thanks to his new family he can move on... and well the dad can appear as the kids like him.
the problem in the end, the kids now he's shitty like that, but the mom pretty much abandoned them, and that scar is a lot bigger (for hotaka).
Also the chopsticks, did he srsly expected wahei to keep it?