Please help me find this manga

[brokie07]

It has tropes like this
The mc is a pretend boyfriend for female character who is from prestigious family
She is blonde and also has twin sister not related by blood and the twin also blonde witn one side pony tail and this anime is comedy,ecchi,romance and it is set on highschool environment

 

[undeed]

twin sister not related by blood

 

[brokie07]

Yeah first they introduce as twins then after few chapters they reveal that they are not related by blood 🤣