For each Master, a Servant. For each Servant, a Master. The relic system was never introduced, and every Master in the Grail Wars has always received a Servant based on their own personality alone. Now, the Magus Killer goes to war - and receives his greatest weapon yet. But even with all of Assassin's skill and treachery, can they stand against the raw power of the Fourth War?

It's the first day of spring, and Cirno and her friends are once again up to no good! But after stealing a strange box from Marisa's house, they soon find themselves over their heads as they discover some things are meant to remain locked up.

He is told to go to the small island base that served as one of the front lines in fighting the dreaded Abyssal Fleet, a new enemy of humanity. He never see these new weapon called 'fleet girl'. His mission? Monitor and review their way of doing battle and also their livelihood. It is a task only the most daring could do.

A scientist down on his luck is invited to work as a researcher for the Abyssal Fleet. These are the journals recording his struggles to protect both himself and some unexpected new friends amidst hostile Abyssals and Fleet Girls alike, dark secrets, and bizarre co-workers.

Life was going normally for 11 inhabitants of Gensokyo until they are transported to a foreign world all of a sudden one day. Little do they know that this is only the beginning of their biggest adventure yet. Touhou/SSB crossover.