The first time Kumiko and Reina really got hot and heavy was at Kumiko's house during a "study session". Quotations used mainly for the reason that both girls had intended to "study" each other the moment they were alone.

They were sitting on Kumiko's bed, textbooks discarded once the facade of schoolwork had fallen. Kumiko felt like someone who had just jumped into the deep end of the pool for the first time. Out of breath and flailing, not sure what to do with her limbs and a second away from drowning. Drowning in skin and lips and Reina's soft sighs as their embrace grew increasingly heated. All her senses were being overloaded with learning these new sensations. She wanted to put her trembling hands everywhere at the same time, but scared that she would somehow mess things up. Her hands settled into the task of holding the other girl as closely as physically possible in their sitting positions. Reina was just soooo good at this, making Kumiko's head spin with the way her tongue slid feverishly against her own. The euphonium player felt her confidence waning rapidly that she would be outperformed not only in band but in this new aspect of their relationship as well.

Attempting to fight back against the overwhelming waves of heat being sent her way, she accidentally bit Reina's lip. Reina's strong breath uncharacteristically hitched against Kumiko's mouth, making the other girl mentally freak out at the mistake. It was a gasp that forced them to pause and separate, much to Kumiko's alarm. "Reina?"

Reina's face was incredibly flushed with embarrassment and she bit her bottom lip, muffling a moan.

"K-Kumiko," Reina shuddered in a way that made the other girl forget how to swallow because of how dry her throat was. Her eyes trailed down Reina's body, from her neck to her shoulder and down her arm to discover Reina's hand buried under her own skirt. Kumiko stared dumbly for a moment, brain frozen at the sight of Reina touching herself. Reina squeezed her thighs together, letting out a whimper as her hand visibly rubbed herself under the fabric.

"Oh my god, Reina," Kumiko whispered in a daze, eyes dancing between the face Reina was making the hand between her legs. She never imagined she could effect the unwavering trumpet player to such an extent. Oh god... she could even smell it. The heady scent left her feeling almost drunk.

Reina seemed to put a great effort into opening darkened eyes to give Kumiko a look swirling with desire, her name falling from those swollen lips again to devastating effect. Kumiko was drawn in so fast her lips were already pressing hungrily against Reina's, waning confidence tossed behind her. They mutually fell back on the bed together, fingertips charged with renewed energy. "Keep doing that," Kumiko said hoarsely as she dragged her lips down Reina's neck.