Got bamboozled a few times in this chapter on what I thought was gonna be the ending lol
Ending 1: Gold & Silver merge back to one (Black Erika) keeping all memories, a 1 couple good ending "When two become one"
Ending 2: Noborou splits permanently to two persons, so it's a two couples good ending "Kin no Kareshi, Gin no Kareshi"
Ending 3: The simple and straightforward 3P (threesome) harem ending "Three heads are better than one"
Ending 4: Either Erika or Ginka gets lucky and the other disappears normal ending "Bittersweet"
Ending 5: Neither Erika nor Ginka wins, some other girl is chosen secret ending "Dark Horse"
Ending 6: None of the girls are chosen, no couples bad ending "Hello Darkness my old friend"
Went from ending 2 to 3 to 4 then a deus ex machina in the epilogue to go back to ending 3.
It's a good ending, everyone is happy.
p.s. Ginka has a lot of catching up to do, p.33 indicates Erika already climbed the stairs to adulthood with him.