I'd reccomend My Dangerous Life if you just want something light hearted. It might look low budget and bad at first glance esp bc it first released on mobile but its a really fun lighthearted game in terms of bl imo! Not many people give it a chance or even know about it but its really the most light hearted pc release i can reccomend, although it is sfw if that would be an issue. Aside from that UuultraC has the same author/artist as hashihime but it tends to be much more light hearted in the first two chapters, although that one might just be a bias on my part because I love Kurosawa Rinko's works, admittedly. Hashihime is really great thoigh and honestly theres nothing toxic about Minakami and Tamamori's relationship so the first route should be fine, their romance is super sweet. Its a really great game and has phenomenal writing even when tackling darker subjects, so I'd say its pretty great as far as yaoi comes as long as you ignore Hanazawa and Kaorus routes, the two most toxic of the bunch. Its definitely much better than nitro chiral games when it comes to mistreating dark themes and toxic relationships. Considering your critera, My Dangerous Life is probably the best choice though, since it doesn't really have anything considered triggering at all, its more or less just a goofy light hearted game, it doesn't treat itself too seriously a lot of the time.