SEIKIMATSU★DARLING

Ogata, a nice and hardworking man, has only one problem... His love for Takasugi- another man. But by telling Takasugi about his feelings the problem should be gone. Yet another problem arise, Takasugi believes their feelings are too alike and that they therefore can't be together. But who knows what can happen when two men in love go away on a vacation together- both determined to win the seducing game. (Source: Anime News Network) — Description from AniList community (anilist.co).