According to the official blog of Japanese toy company Aoshima Bunka Kyozai, the classic plastic model series "Atlanger" was announced to get an OVA adaptation. The 15 minute long OVA will be released at Comiket 81 in December. The production studio is AIC
and the theme song singers are Kushida Akira
and Watanabe Michiaki
. Part of the OVA was inserted into the OP animation of Ore no Imouto ga Konnani Kawaii Wake ga Nai
Atlanger appeared in OreImo episode 8
The original package of the Atlanger model
Atlanger is a plastic model series first released in 1975. It had not been animated but the robot has a perennial popularity among middle aged fans.
Source: Aoshima Bunka Kyozai