Aishitagari W Darling: Hajimete ga Mitsuha!?

Introverted high school student, Mugi, falls in love with his neighbor, Iyo, who always greets him kindly. One day, Mugi was kissed suddenly by Iyo, who has a different atmosphere than usual. Which is the real Iyo, was he a gentleman or a playboy? While visiting at Iyo’s place one night, Mugi learned that Iyo has a twin brother, Kiyo. While being groped all over by the rough Kiyo, Mugi was spoiled slowly with gentle kisses from Iyo…? The most erotic and cute 3P love is here!!

(Source: Overlap, translated)