Serenity

MC's mom got cancer when he was 15. She fought for 5 years and finally died. During this time, MC did nothing but care for his mom. Didn't meet girls or date, didn't make many friends. His only friend is a girl who practically grew up with him, and she's in love with him... but he has (so far) not accepted her advances. Meanwhile, he learns that his Mom wrote a book for him.
She started on it when she first got sick. He learns that if he reads the book, it will take him to another place that his Mom wrote for him to live out his fantasies for the rest of his life. She had a magical gift he never knew about. Later he'll learn a lot more things about his Mom's past, as well as the power he has stored deep within himself Serenity island is a place full of mysteries he'll need to unlock in order to learn more about himself and his Mother's past. As well, he'll have to defend the girls from a dark presence that will make itself known. The MC will have to break through is shyness and "grow a pair"... become a man, protect his harem of girls, and fight to keep his new home