Toaru Hikuushi e no Tsuioku
Koroku Inumura's first Hikuushi series. Charles, a mercenary pilot of the Levamme Imperial Air Force, received an secret order. "Fly 12,000 kilometer across the sea in the middle of the hostile territory and send the Princess securely to the main land." He fought against a devastating number of fighters and overwhelming battleships to protect Princess Fana. This is about a forbidden love between an orphaned pilot and a girl with an unchangeable destiny. (Source: MAL News)
ComedyShounen AiSlice of Life
This is a really cute, sweet story about two single dads Asakura and Kentarou, whose young sons happen to go to the same daycare. (Source: MU)
Roman Album: Taishou Dennou Dadaism Emaki - Despera
The story centers around a 12 year old girl named Ain, who often builds random devices despite the lack of scientific background for them. The sci-fi alternative period story is set in Tokyo during the Taisho era in 1922, one year before the 1923 Great Kanto earthquake. (Source: Wikipedia) Note: There are some differences in story between serialized version and published book.
Towa has always been shy around guys, despite being a total tomboy. This has crushed her chances of ever having a boyfriend, but a perhaps fateful encounter on the first day of high school might lead to love? But will it be with the surprisingly kind "angelic" delinquent, or the popular yet secretly "devilish" prince?!
Umineko no Naku Koro ni Tsubasa
A compilation of additional tips written by Ryukishi07 outside of the games. Several of the stories are humorous in tone, but the more serious ones may be considered canon.
Shiga, a mountaineer, leaves his isolated lodge and returns to Tokyo in order to track down Megumi—the missing daughter of Tatsuko (Shiga's deceased best friend) and Yoriko (whom Shiga has secretly been in love with since before Tatsuko died). Shiga's investigation takes him into the world of "compensated dating" and disaffected teens and what he discovers there suggests that Megumi may have been abducted by a pedophile with a great deal of power and influence. In order to save the girl and regain the self-respect he lost when his best friend died, Shiga must break through the wall of silence and do what the police dare not. (Source: ANN)
Strike Witches Zero: 1937 Fusou Kaijihen
The story follows Sakamoto Mio as she receives training to become a Witch from Kitagou Fumika. The plot will later shift to the Fuso Sea Incident as the story progresses. (Source: Strike Witches Wikia)
Kagerou Daze Koushiki Anthology Comic: Sweet
An anthology of Kagerou Daze sweet themed stories by various authors.
During a fateful visit to Tsunojo Girls' School, Chika Matsuzato meets the girl of her dreams: cool upperclassman Haruna Kizaki. Even though they spent only one short day together, Chika will never forget Haruna's kindness, and has made it her life's goal to study hard and get accepted into Tsunojo Girls' School so that they can be together. But will Haruna share Chika’s feelings...? (Source: Seven Seas)
A young girl dies while stalking a girl. Her ghost continues to follow her around, interfering with anyone who tries to confess their love. An old childhood friend of the subject also has a crush and can see the ghost. They battle each other and all newcomers for her affections.