Not Stockholm Syndrome (as he isn't a victim of abuse, kidnapping, rape and so forth). A more accurate description would be an twist on or combination of an Oedipus/Electra Complex. Oedipus Complex is where a man/boy falls in love with his mother, and an Electra Complex is where a woman/girl falls in love with her father. Since this is a guy falling in love with his father, it is not a straightforward version of either of those though, but, as I said, a weird combo (I guess?). If someone else knows a SPECIFIC scientific name for a guy falling in love with his FATHER or a girl falling in love with her MOTHER, I would definitely like to know what it is.
Ok little bit cringy that he is in love with his own father it's just like Stockholm Syndrome. Will wait for more development (〜 ̄△ ̄)〜