Hello!! Thank you for your comment ^^
There's already a ton of official lore on Tumblr, including small snippets on how Ren and Angel met, why he likes them, lore about his family and backstory, etc.
I can't, however, say when it will all happen in-game; as that's spoiler territory and I wouldn't want to ruin the surprise for others. A lot of lore does come out eventually, but it's too early on for it to be revealed right now (we still have 11 more days to go ^^) Hopefully you understand!!