This makes more sense as to why Taehoon has a soft spot for Hobin, but it also makes more sense as to why Taehoon is telling Ji-Yeon to live his life the way he wants to live it because Ji-Yeon reminds him of how Dowoon always studied.
This makes more sense as to why Taehoon has a soft spot for Hobin, but it also makes more sense as to why Taehoon is telling Ji-Yeon to live his life the way he wants to live it because Ji-Yeon reminds him of how Dowoon always studied.