Upon hearing Sumire getting defensive, the girl called Nagai burst into laughter as her eyes flickered to me again. From what I could tell, she was quite confident that she could corner Sumire this time. What she was banking on was possibly me. Or specifically, the fact that I was present. With Sumire not denying our relationship, she's thinking that Sumire wouldn't want to cause a scene in front of her boyfriend.
"Hmm? Of course, I won't. Senpai, I apologize for this but you see, Kohinata-san and I have... quite a history," Nagai said as her lips slowly curved up into a smirk. She's totally convinced that Sumire would just sit still and let herself be pushed around by her.