Gekijouban Sekaiichi hatsukoi: Yokozawa Takafumi no baai (2014)

Being a Yaoi-anime, the level of situations such as seductions and kissing are basically nothing comparted to what's shown in the TV-series.

A man is shirtless in the beginning.

Several talking as related to being gay.

One brief kiss between two men. The post-credits sequence shows an "embarassing" photo on a phone, showing a sleeping but shirtless man.