Nagatsuki sure is embarrassing. Her delusional level just keeps getting higher and higher. Coco is taking this too far if she wants us to have any sympathy for Nagatsuki when her fantasy world comes crumbling down around her when she realizes that Ookuma is only interested in Chiyo.
"But if ookuma-senpai was genuinely a nice guy..." Why don't you just stop being two-faced, Chiyo, and tell Nagatsuki about the Ookuma you personally know. What is more important to you, keeping a secret with Ookuma or being honest with your supposedly best friend (not to mention your "boyfriend")?
And it sure seems like Chiyo just can't get Ookuma out of her head, comparing him to her boyfriend... Really, Chiyo, who do you actually like more???
And Igarashi, I know you're an ignorant buffoon, but you shouldn't be lauding praise about Ookuma in front of Chiyo, and especially comparing yourself to him. You are describing her perfect dream guy who is, unlike you, smart, handsome, rich, professional. To her, you look like a fool or, using her favorite word to describe you, an idiot compared to Ookuma.
And what's with, "I’m here to rub your pineapple bread!"? That's one hell of a euphemism!