Kiss shinakya Shinjau !?

Synopsis

Nayu is a boyish high school girl. She and her childhood friend Asahi have been having a good time lately, but... When her sister's spell fails, she is cursed to die of a seizure if she doesn't kiss the slutty Saku!! Nayu hates the naughty and domineering Saku, but every time she kisses him, she gets hotter and hotter, and her body reacts...? (Source: Shogakukan, translated)