It literally came out of nowhere for MC al well though. She was gonna get mugged by her, they decided to turn it into an arcade date, MC became attracted to Yanagi and was one of the first girls she was okay with pursuing in a romantic/sexual way without the need of the potion. How was it with VP? She was impressed with how MC acted and spoke about her friends, she wanted to break free of her constant search of approval from The Prez, and she acted on her own in order to help out the group, and she became engrossed with Yanagi when they finally spoke, thus leading to them sharing a bed.