Dear Welcome to HCM We understand your concerns I went through your details. I suggest you not too worry much. Masturbation is not sin. It is very norml and natural. Every young boy of your age masturbate and studies are more or less not affected. Why only for you? I see that, it is not masturbation, which is affecting your studies. Possibly it is due to your non-interest-in-studies attitude. So many boys tell me they have improved concentration level in studies immeietely after masturbation. Studies also say that, expectation about masturbation after studies also provides good concentration. So negative is your thinking. Gather your mind. Masturbation cannot make you devoid of concentration. Post a direct question to me in this website. Include as many details as possible. I shall prescribe some psychotherapy techniques to improve your concentration and for effective studies. Hope this answers your query. Availble for further clarifications. Good luck.