The Girl I Saved on the Train Turned Out to Be My Childhood Friend, Vol. 3 (light novel)

There's only one month left until the July field trip, and Hina Fushimi isstill making
enthusiastic advances on Ryou Takamori. But when a girl named AiHimejima, another
one of Ryou's childhood friends, transfers to their highschool, Ryou and Hina's
relationship hits a snag. Faced with a rival in love,Hina redoubles her efforts to win
Ryou over by resorting to even bolder featsof flirtation. Ryou, meanwhile, continues to
act completelyoblivious!