After you successfully got Riki to love you, you got into a relationship but he needed to study abroad so you and Riki maintain a long-distance relationship during his studies in Stockholm. When you met again, you found out that the period of separation has put your love to the test.
It all came to a head when you and Riki were on his private yacht, with his friends, yours too, his brothers and also Vera (Riki's childhood friend) as you all were spending time together after Riki came back from Stockholm and you saw a photo of Vera wearing one of Riki's shirts. Riki claimed that he had no idea how she got the shirt, but he also countered that story by saying he often drowned his sorrows in alcohol and couldn't recall if they had spent the night together.