Big brother is gay and fell in love with little adoptive brother without noticing. Dated a teacher that was married as a way to discover sexual orientation. Little brother loves the strong big brother and respects him until seeing big-brother in a relationship with a male-teacher... Thinks big brother is sexy and cute when heartbroken. Wants to have a relationship but wants to keep the status quo.
In the end have sex like crazy to compensate 8 years of acting like brothers and walking the straight path of being with a woman without love XD
Uchi no Ani no Renai Jijou