Why do LN-based anime heroines get undressed within 3 minutes? | MANGA.TOKYO

2 minutes and 28 seconds, 2 minutes and 32 seconds. Can you guess what these represent? They are the time it took a protagonist to see a heroine getting undressed on 2015 autumn season anime, "Rakudai Kishi no Cavalry (Chivalry of a Failed Knight)" and "Gakusen Toshi Asterisk(The Asterisk War)" res…