SugarySugar's manga / #Family(4)

Kouji and his older brother leave their home because of a runaway mother and an abusive father. A few years later, his older brother's lover starts to live with them, and later on Kyouji's senpai confesses to Kyouji

1) A brother and a sister live together and are barely getting by, so the brother sells his body to a businessman, who later turns out to be his sister's fiancé 2) a new business is sent to the mountains to negotiate with the owner to build a ski resort, however after an injury, he is taken in by a mountain man