Prequel story to Flower Knight Girl, a Japanese Free-to-Play RPG Gacha Game published by DMM Games.

One day, an alien named Yoden arrives on Earth and uses a mysterious tool called the "Ability Gun" to collect and inject the special powers of various living creatures! Using the special abilities he has collected from space, he will change the fate of Earthlings into something super happy! (Source: Shogakukan, translated)

It's time once again for the annual family gathering on Rokkenjima! Ange Ushiromiya is just getting over a cold, but that won't dampen her excitement at seeing her cousins again! Granddad couldn't be more thrilled to see his beloved grandchildren and throws a special Halloween party where everyone gets lots of treats! By lunchtime on the first day, the aunts and uncles are chatting up a storm, and the cousins are eagerly planning the afternoon's fun. It's the very picture of a happy family-one that in no way resembles the bickering, bitter Ushiromiya clan! What is going on?! (Source: Yen Press) *Note: Includes 4 extra chapters.*

Kaiji and Kazuya face off against each other in a high-stakes game of "One Poker," a modified version of standard poker. Kazuya sets forth a gamble of 2,000,000,000 yen! How will Kaiji survive?! *Chapter count for this arc is 101-254 in the original tankoubon.*

Zeon ace pilot, Commander Char Aznable, thought he could foil the Federation's plan to build a mobile suit by attacking their research base on colony Side 7. He was wrong. With a prototype already active, the besieged Federation forces strike back using their new weapon, the mobile suit Gundam, with devastating consequences. Amidst the fighting, young electronics wizard Amuro Ray is determined not to let his friends and family die in the crossfire. But what can one boy do to repel a squad of mobile suit-clad invaders? (Source: VIZ Media)

Ne'er-do-well Kaiji Itou's shiftless existence is suddenly rattled by a visit from the yakuza. Burdened by debt and resentment, Kaiji is coerced into gambling for his worthless life. As the stakes grow higher and the rules become increasingly more bizarre, Kaiji must finally take the future into his own hands! (Source: Denpa) *Note: Won the 22nd Kodansha Manga Award for general manga in 1998.*

After a disastrous defeat at the 2018 World Cup, Japan’s team struggles to regroup. But what’s missing? An absolute Ace Striker, who can guide them to the win. The Japan Football Union is hell-bent on creating a striker who hungers for goals and thirsts for victory, and who can be the decisive instrument in turning around a losing match…and to do so, they’ve gathered 300 of Japan’s best and brightest youth players. Who will emerge to lead the team…and will they be able to out-muscle and out-ego everyone who stands in their way? *Source: Kodansha USA, Vol. 1*

Kurosawa is sick and tired of his boring, ordinary life growing old as the less popular site foreman in Anahira Construction. The turning point comes when his 44th birthday comes along, and no one remembers or celebrates with him. Realizing he lived a life without drive or purpose, Kurosawa tries to go past his comfort zone to turn his life around. Will his newfound shenanigans help him or hurt him when he gets caught up in fights with delinquents? (Source: Manga Planet)

After Kaiji's showdown with Chairman Hyoudou at the Starside Hotel, he's forced into labour at an underground mine. With his meagre daily wage, he'll be working for decades to repay his debt unless he does something about his miserable situation. Kaiji decides to wager his earnings in an underground dice game for a ticket to get out of the mine for a limited period of time. But even if he surfaces, he only has one chance to win it big: by challenging the unbeatable pachinko machine nicknamed "The Bog."

The time for logical debate and magical feints has come to an end; the revelation of the truth about Beatrice the Golden Witch is at hand. To facilitate this, game master Bernkastel has chosen Will Wright the Mage-Hunter to step onto her board and answer a single question: Who killed Beatrice? Joining him in the game is Lion Ushiromiya, Krauss's firstborn and heir, whose role is a mystery in its own right. Will's line of questioning draws together the stray strands from all the previous games, twisting them into a thread of truth, revisiting Kinzou's first encounter with the young Beatrice and working through the legends that have since sprung up around her... (Source: Yen Press)

Beatrice is dead, her soul shattered by Battler at her own request. Though her body sits across the chessboard, she is no more than a husk of the laughing, impulsive witch she once was. Lambdadelta is more than happy to preside over the fifth game, and Bernkastel willingly steps in for Battler as he takes his leave to collect his thoughts. But two witches can cause all manner of mischief when left to their own devices, especially when they care as little for rules as Lambdadelta... (Source: Yen Press)

This is regarded as the chapter where "the best situation has been provided," but it takes the courage of a certain character to change the course. This will answer everything, however there is one chapter left - Matsuribayashi-hen. (Source: Wikipedia)