The male lead gains ability to repeatedly go back in time to 'correct' certain situations so they can grab a hold of the heart of a girl they are interested in

The leads gain the chances through a third party to redo specific bits of their past. They receive the knowledge from that third party, and try to alter those specific bits of the past to end it on a happier note; at the same time altering the present they are currently in. The more of those bits they altered that built up, the more the future diverged from it's original course.

The leads coming from a modern age end up back in time to the age of warring states, where samurai exists; and try to temporary live in such a world full of strife. They encounter, move the people around them, and fall in love. The only big difference is in Ashi Girl, it's the female lead; while in Nobunaga Concerto, it's the male lead.

Female leads are vampires that try to live a normal upstanding life among humans in society. They try to fight the urges from being born a vampire, and hide their identity as a vampire; but things change when they fall in love.

Memories are precious. The leads realized they are losing memories from which is out of their control. They might be gaining as much as they are losing the memories of the time spent together, but they desperately try to hold onto it by recording it down on paper.

Dramas focus on memories. One of the leads lose their memories when a specific time frame passes, forgetting who they've previously been intimately involved with. This doesn't disrupt their daily life, but it affects their relationships and ability to connect with others.

The male leads suffer the loss of a parent, and the heroines wants to become the male lead's 'pillar of strength' to overcome the loss. It's the heroine that makes an effort to take the initiative in both dramas. A story that involves the support of friends, and romance.

Although there are slight differences how the time manipulation works when comparing both dramas, they are about returning to a certain point in time. The protagonists fall in despair full of regret from experiencing something irreversible, and try to alter a tragic fate after being given another chance. A pure love story of an earnest attempt at trying to save the one they love.

The heroines have a hearing disability. One's a college student; which focuses on school life, while the other is a working adult. They struggle on handling things on their own. They suffer backlashes just from trying to be 'normal'. An encounter happens, and romance ensues.

The heroines have a hearing disability. They are both working adults that struggle on handling things on their own. They suffer backlashes just from trying to be 'normal'. An encounter happens, and romance ensues.

The main leads are mind-readers. They ended up going through the pain of being able to read the real thoughts of others that tend to be malicious, but they manage to encounter that one person who is different from the rest.

The setting focuses on youthful romance and drama. Also thankful both drama is couple-based, as there aren't any unnecessary love-triangles, indecisive leads, and cockblocking.

Dramas are about guardians wanting to save a child from abuse by their real parents. The difference is that 'Mother' struggles through the forceful approach, while 'Hajimemashite, Aishiteimasu' struggles through the legal approach.