I forgot the name of the anime i watch is just tip of my tongue

Hello, I'm trying to remember the name of an anime I watched, but I can’t seem to find it anywhere. I’ve gone through search tools and lists, but nothing fits the scenes I recall. It might be lesser-known or not talked about much. Here are the details I remember:

The main character is a high school boy, and the anime has romance, harem, and school life themes.

Two girls are his exes — one is a childhood friend, and the other is from high school.

Both of them made his life difficult in the past, and the story seems to revolve around them trying to make up for it or reconnect.

The tone is a mix of emotional and comedic. There’s nothing supernatural, horror, or science fiction involved.

His sister is also part of the story. One scene shows her kissing him under a bridge. There’s also a memory of her pushing him from a monkey bar-like structure, which caused an injury. She feels guilty about it.

There’s a scene where the two exes overhear something he says, which surprises them.

One of the exes is a basketball player who was invited to a club but refused unless the MC joined. He later ends up playing basketball, possibly in a setup where she wanted him to lose so he’d join.

The MC’s father is absent or unknown, though the parents are mentioned.

It doesn’t seem to be a popular or well-known title idk, so I’d really appreciate it if anyone recognizes these scenes. Thanks in advance.