ヤキモチの答え (Yakimochi no Kotae)

Background
HoneyWorks uploaded the song onto both Nico Nico Douga and YouTube on March 14 2013, since then, it has entered the Hall of Fame on NND and reached over 2 million views views on YT.

It's part of Honeyworks' Confession Executive Committee Love Series and it tells the story of Mochizuki Souta and Hayasaka Akari.