Short extras of the anime included in each of the six Blu-ray volumes of Amagami SS+.

Six long months have passed. The Raalgon Empire has developed a horrible new type of weapon, and Tylor has been charged with the duty of intercepting it as it is being transported. But when all that could go wrong does go wrong, the crew members of the Soyokaze find themselves at the mercy of their enemies. As the hours tick down toward their execution, the crew wonders: has their irresponsible captain misled them? Or is this all a part of some greater strategy?

Specials released with the Blu-ray/DVD volumes.

The Maison Ikkoku tennants throw a party to celebrate the marriage of Yuusaku and Kyouko. However, during the party Yuusaku hears that Kyouko is waiting for a letter. He becomes jealous and begins to doubt Kyouko, worrying that she still loves someone else. When the morning arrives, the answer to his worries is revealed...

(Source: AniDB)