Complex sentence: He's rather short and dislikes being reminded of it, especially by Dazai he was very happy when he was told Dazai had left the Port Mafia and opened a 69' wine bottle.
Split into simpler sentences: He's rather short and dislikes being reminded of it, especially by Dazai. He was very happy when he was told Dazai had left the Port Mafia and opened a 69' wine bottle.