There’s a Ribbon Mascot Comics 70th anniversary sale right now (unfortunately it doesn’t look like they’re a part of Kadokawa since it’s not also a part of the coin back deal).
Highlights are 満月をさがして | L24 and こどものおもちゃ | L23 with first volumes free to read and some additional volumes for ¥77. Lots of other series as well.
Link to the sale page is here:
I haven’t checked Amazon but I imagine it’s also on over there since it’s a publisher sale.
Volume 1 of both books you mentioned is the same. I didn’t check past that
There’s a somewhat random free-to-read + sale thing happening on Booklive.
There’s 異世界美少女受肉おじさんと 1 | L26 in there, and possibly more volumes, but I can’t check since I own them all already. For TSUYOSHI, volumes 1 to 4 are free to read, so I assume it’s a similar number.
By the way, you do not need an account to read “free to read” stuff.
Edit:
Also, a few LN series I have read, for instance 後宮妃の管理人 | L33, appear to be half off until the 24th. I don’t know why. Edit2: 本好き is one of them too, for that matter.
Rakuten Kobo is having a sale for 名探偵コナン manga series. 40% for purchase of 10 and above. But they also have full versions of 16 manga volumes for free until 15 May 2025.
https://books.rakuten.co.jp/event/e-book/camp-jcg/index-sp.html?dir=2025/04/&mid=204345
PSA: it looks like Golden Week sales are going live today. A lot of my wishlisted books are about half off, and BW also has a pretty far reaching coin back promotion on top of sales.
I’d complain about my wallet but I’ve been not buying books at mediocre sale prices for months waiting for the GW sales, so…
Bookwalker has a site-wide 40% coin back. Which is admittedly less impressive than the previous 60% coin back, but it affects more books, many of which are also no sale.
There’s many Kodansha mystery books on sale for example.
Like this one (which I hated, but many other people liked, so…)
Or this one (which I found very enjoyable):
There are actually several past Mystery Club picks in there. I’ll browse for new ideas.
Edit: This one too! Highly recommended.
Edit2:
I hadn’t noticed this one before. It was a lot of fun. A collection of short stories that all include a narrative trick. Even if you’re warned about it, it’s easy to be tricked.
could be interesting, and currently costs just 10円 at Renta! and maybe somewhere else as well; volume #2 the same, the rest is half price.
The entirety of アンジェリーク | L24?? is on sale on Kindle for ￥１６５ and ネオアンジェリーク | L23?? for ￥１７１．
Anything you could share about either series? That’s quite a deal, and it looks maybe interesting. But I’ve impulse bought so much manga lately that I don’t wanna buy something I’m unsure about
Well, I’ve played the game アンジェリーク | L24?? was based off of, but I honestly have no idea how they chose to adapt it; it’s a world-building sim with guys you get friendly with, so based on past experiences it’s possible each manga volume focuses on one guy.
I don’t know anything about the second, unfortunately; haven’t played the game for that one to see if it’s got a much more fleshed-out storyline to adapt.
Gotcha… The fact that it’s based on a game makes me wary, as I rarely hear about those being good adaptations.
Also I just looked at how much I’ve spent on digital manga this month, and woooow I need to cut myself off 
. So I’m passing on this one
In addition to their 50% coin-back, bookwalker currently also offers a 70% off coupon for new customers.
Hmm… maybe it’s time to make a second account…
Flesh&Blood is currently 50% off the first 10 volumes on Amazon Kindle; it was on sale on Bookwalked some time back I believe, but searching now doesn’t bring anything up? 
Some bookwalker codes for 新潮社テキスト作品 currently up for grabs:
Cross posting TO Books sale:
I don’t know if I’ll ever read it, but 光が死んだ夏 1 | L27 is on sale for 77 yen on Amazon, so I figured I’d get it.
I bailed on the anime (it’s probably cool, just not in the mood), but that’s tempting…
Sub ¥100 doesn’t count against my 積読. I buy at that price even if I’m not sure I’ll ever get to a book/series.
There’s a ton of Yurihime volumes on sale at Bookwalker, lots of vol 1-2 at ¥22, and half off later volumes. On top of a 50% coin back for orders ¥1500 or more.
Seriously Bookwalker needs to stop this 
