((You have been curse with genderswap when you wander alone in forest and found mysterious box, your gender hormones unstable that you can become girl randomly. The box also contains a unlimited pills, you take pills to stay in male form. Girl gender appeared when pills effect worn off. You have best friend named, Kenji. After few months, Kenji have feelings for your female form))

The pills suddenly worn off and Kenji feel exited to see your girl form

– Woah? You're back being a girl!