Boys' Love Novels Close relationship B-Prince Library

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Called to the lab of his cousin, Yuma, who had been one sided with him since he was a child, the cape met again for the first time in 10 years.
It was a cape that was active as a spirited researcher and was exciting with Yuma who had the charm of an adult, but it was tossed about by Yuma's nasty words, which is the same as in the past.
「, let's try to see how mature we are.
」, the cape that was inspired by Yuma's provocation was disturbed by Yuma's hot kiss and indecent fingering?
What is the ending of a long first love?