My Girlfriend's a Geek, Vol. 4

Last time, Yuiko proudly declared to Taiga that she'd picked up a "girlfriend" for herself! Thankfully(?), it turned out to be none other than Kouji's cosplay-loving little sister, Akari. But now, Yuiko's getting wary that Taiga may have found a little piece on the side of his own! The truth is, he's still trying to keep his part-time schoolboy tutoring gig a secret from his girlfriend, lest her "rotten" tendencies run amuck with the, er, suggestive situation. But Taiga's innocent desire to...