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

A RIVAL CHILDHOOD FRIEND APPEARS!Hina Fushimi continues her enthusiastic pursuit of Ryou Takamori, but when another old friend of Ryou's transfers to their high school, she learns her status is not as unique as she thought. With Ai Himejima's arrival on the scene, Hina and Ryou's relationship hits a snag. The two girls compete for Ryou's attention, and both take bold measures to win him over -- especially Hina. However, he still remains oblivious to their feelings! On the upcoming school field trip, will this change?