Tolong jelaskan mengenai "Heart no Dasshutsu Game" dari Labrador Retriever (lagu)

Team 4: Saho Iwatate, Rio Okawa, Miyu Omori, Ayaka Okada, Nana Okada, Rena Kato, Yuria Kizaki, Saki Kitazawa, Riho Kotani, Marina Kobayashi, Haruka Komiyama, Yukari Sasaki, Kiara Sato, Ayana Shinozaki, Nagisa Shibuya, Yurina Takashima, Mizuki Tsuchiyasu, Miki Nishino, Mitsuki Maeda, Minami Minegishi, Mion Mukaichi, Yuiri Murayama, Shinobu Mogi