BL Manga Name Help

There is a story about twins that I read but I forgot the name. There is a story about the younger twin and the older one. I remember it starts with the younger twin getting mistaken in the shower for his older twin brother. Then he encounters a tenant below his apartment who is older than him and they end up becoming close as the younger twin kept visiting his place. I also remember a part where the older guy bought an ice machine to make shaved ice for the younger twin (I hope this part rings a bell). The older brother's story is when he meets a guy that unknowingly becomes his lover from a one night stand. The younger twin  sees him and gives him his support for being a good guy and tells him to stay with his brother. I remember bits and pieces but this is all I came up with this time.