That girl, Nam Ji-eun, keeps lingering in my mind. But because she's the same sex, I can't even express my feelings properly... Even if I tell myself to be satisfied with just being friends, emotions don't always go as planned. Then, after noticing a subtle change in Ji-eun's attitude, Yuri, filled with certainty, confesses her feelings that she can no longer hide. 'I crossed the line drawn between friends.' (※ I recommend reading 'Night and Night Main Story' first, then 'Between Friends', and finally 'Night and Night Side Story' for the best experience.)