One of Niou's favorite phrases ever is "If you didn't lick it, it's not yours". Or, "I licked it, it's mine."
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"Marui, can I have a couple of bucks?" Niou asked, walking lazily up to The small tennis player after practice.
"Why?" Marui's eyes narrowed in suspicion.
" 'Cos I need some?" Niou suggested, shaking his head a bit at Marui's foolishness.
Marui pulled out a couple of bills, then licked them. "Here." He said, holding them out to Niou with a few levels of amusment.
Niou blinked at them a minute, then said, "You licked them... They're yours." Then turned and stomped off. Surely, Yagyuu would give him some cash.
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Niou, to say the least, lived by the phrase, "If you didn't lick it, it's not yours." That was his way of doing everything. Money, cards, pencils, tennis rackets, tennis balls, his hair products... especually when Marui claimed Niou stole his hairspray. Niou would just lick it. Then, it was his.
Niou didn't like people touching his things... besides Yagyuu. Yagyuu could touch his things. But no one else could. Niou would lick them, and they'd be his.
This little rule of Niou's is what got his and Yagyuu's relationship to where it was today. Passionate, hot, heavy, and never-ending.
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Niou and Yagyuu had decided to spend the day at the mall, hanging out in the food courts. At some point, a group of girls had drifted by and started talking to them. Niou ignored them completely. He looked away and let his mind wander while Yagyuu had a polite conversation.
At some point, when Niou dragged himself back into reality, he realized that... Yagyuu was flirting with the girls. That was... very unlike Yagyuu. But the burning anger deep in Niou's stomach was strange too.
"So," One of the girls said, brushing her hair out of her eyes and biting her lip. She rocked back and forth on her heals. "Can we like, exchange numbers?"
Before Yagyuu could say anything, Niou leaned over, and licked Yagyuu's neck. Slowly and seductively.
This caused Yagyuu to jump and the girls to stare in shock.
"Niou-kun?" Yagyuu questioned his best friend quietly.
Niou wrapped his arms around Yagyuu's neck and rested his chin on his shoulder, looking at the girls with a blank, but cold, stare. "I licked it." He said smoothly. "It's mine." His gaze drifted up to looked at Yagyuu, who's eyebrows were raised in surprise. "Your mine, Hiroshi, okay?"
"Masaharu..." Yagyuu said slowly, frowning a bit in confusion.
The girls' jaws dropped. The one who had asked for Yagyuu's number let out a shocked, "Ehmaigawd! Your not gonna go with that, are you, Yagyuu-kun?"
Yagyuu simply took Niou by the face, and kissed him gently and quickly. "I actually think I am."