R-18.

Isaac touched the helm of Luna's shirt and pulled it off. After he removed the shirt, Luna still wore the t-shirt, hiding the bra.

Despite her shyness, Isaac grabbed the shirt and gently removed it. After Isaac tossed the shirt away, her blue bra with flower patterns was the last fabric left.

Luna shyly crossed her arms, hiding the bra behind her arms.

After planting a soft kiss on her lips, Isaac moved his hands behind her back. He unhooked the clasp and slid the bra over her shoulder.

Luna closed her eyes with her whole body quivering. Suddenly, she sucked her lip and moved her arms sideways, revealing two soft mounds.

Isaac slightly gazed down and saw the two soft mounds. They were bigger than he expected, with erect pink nipples.

'D-Size, maybe?'

Luna hugged him tightly, rubbing the two soft mounds against his chest. Then, she began raining kisses around Isaac's cheeks, neck, and collarbone.