[Satetsu] Bewitching Smile (COMIC LO 2013-04) [Facedesk]

When their parents leave on a business trip, a grinning girl bounds up the stairs to greet the older brother put in charge of her — and immediately challenges him to a contest she fully intends to win. Triumphant, she straddles him with a bewitching smile and rides him with shameless hunger, teasing him about how horny he is while begging him to fill her up. One round bleeds into the next, her ass offered up when he can barely keep going, until she is left sprawled and dripping with even more cum than the first time.