Omae no Suki wa Shinjinai!

One day, Nishino, who has a virginity complex, loses his "first kiss" to his friend Higashiyama in a fender bender. Nishino is shocked to lose his cherished first kiss to Higashiyama, an experienced and charming guy, who is very carefree.

The next day, Nishino, depressed and sleep deprived, is sleeping in the infirmary when he suddenly feels a groping sensation in his mouth! When he wakes up, he finds that Higashiyama has taken his lips again! Nishino's face blushes from the unaccustomed pleasure of being kissed so intensely, and he is out of breath. Higashiyama sees this and suddenly confesses, "Cute, I've fallen in love with you..."

(Source: East Press, translated)