The one and only true love of 15 yrs old DAD and 17 yrs old SON!! (O‿O) The time travel circumstance caused this beautiful pure love. so it's not exactly 'Incest' to me, it's just 'Destiny'. Who knows? If they hadn't had relationship, son wouldn't have been even born.
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
Chou yo Hana yo (WATANABE Asia)