Fics like Positive Reinforcement

'“There's chocolate on your lips, you know,” Daichi says. “And my fingers,” Suga says, and Daichi's eyes drop to where his hands are folded over his stomach, before he lifts one and brings it to his mouth. This is why it's very hard for Suga to not break the rules. Daichi rewards him, every—single—time.' -- Suga can't resist eating sweets in bed. Daichi can't resist cleaning it up.

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