I guess the mangaka forgot to draw it for him? or he probably did away with it during the period they broke up. It's also possible he just put it away.
if i remember it ryt..he put the ring away because he didnt want to be teased by the other guys..i think he mentioned that if they saw the ring they would definitely teased him coz its the same as with the boss..or sumthin like that..quite not sure by the way..
Hey does anyone else noticed that it really doesn't show ewon with his ring or is it just me????